Rounding And Estimation Workbook
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Rounding and Estimation
5 or more, raise the score! 4 or less, let it rest!
Table of Contents Rounding and Estimation Wild Round-Up #1 Round 'Em Up! Wild Round-Up #2 Measuring on the Farm Measuring Food Measuring Nature Measuring on the Road Measuring Sports Rounding and Subtracting #1 Rounding and Subtracting #2 Rounding and Subtracting #3 Estimate the Sum Sweet Estimation Magical Math Front-End Estimation Round and Add #1 Round and Add #2 Round and Add #3
Certificate of Completion
Want more workbooks? Join Education.com Plus to save time and money. http://www.education.com/education-plus/ Copyright © 2013 Education.com. All Rights Reserved
Round the numbers to the nearest 10! If the ones number is 5 or greater, round up to the nearest 10. If the ones number is 4 or less, round down to the nearest 10.
18
Created by:
20
13
10
24
47
32
11
9
56
88
73
3
65
95
41
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Round ‘Em Up! Round the numbers to the nearest ten. Rounding to the nearest ten If the ones number is 5 or greater,round up to the nearest ten. Example: 17 If the ones number is 4 or less,round down to the nearest ten. Example: 12
56
31
18
43
12
27
35
67
48
61
73
86
79
84
24
52
20 10
Rounding to the nearest hundred If the tens number is 5 or greater,round up to the nearest hundred. Example:161 200 If the tens number is 4 or less,round down to the nearest hundred. Example:118 100
486
266
521
651
824
148
378
234
333
613
883
949
551
195
728
762
Here’s a little rhyme to help you remember how to round numbers: 5 or more, raise the score 4 or less, let it rest
Created by :
Copyright 2008-2009 Education.com
www.education.com/worksheets
Round the numbers to the nearest 100. If the tens number is 5 or greater, round up to the nearest 100. If the tens number is 4 or less, round down to the nearest 100.
185
200
136
100
315
475
136
722
97
556
818
361
228
685
165
998
Created by:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Measuring on the farm! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number.
A
C B
A: How long do you think the pig is?
Inches:
Using your ruler, how long is the pig? B: How tall do you think the pig is?
Centimeters:
Inches:
Centimeters:
Inches:
Using your ruler, how tall is the pig?
Centimeters:
Inches:
C: How long do you think the pig’s tail is?
Centimeters:
Inches:
Using your ruler, how long is the pig’s tail?
Centimeters:
Inches:
Centimeters:
A: How tall do you think the duck is?
B
Inches:
Centimeters:
Using your ruler, how tall is the duck?
A
Inches:
Centimeters:
B: How long do you think the duck’s neck is? Inches:
Centimeters:
Using your ruler, how long is the duck’s neck? Inches:
Created by:
Copyright © 2012-2013 by Education.com
Centimeters:
More worksheets at www.education.com/worksheets
Measuring food! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number.
A: How tall do you think the apple is?
B
Inches:
Centimeters:
Using your ruler, how tall is the apple? Inches:
A
Centimeters:
B: How long do you think the apple stem is?
C
Inches:
Centimeters:
Using your ruler, how long is the apple stem? Inches: C: How long do you think the apple seed is? Inches:
Centimeters: Centimeters:
Using your ruler, how long is the apple seed? Inches:
Centimeters:
A: How long do you think the peanut is? Inches:
Centimeters:
Using your ruler, how long is the peanut? Inches:
Centimeters:
B: How wide do you think the peanut is? Inches:
A
Centimeters:
Using your ruler, how wide is the peanut? Inches:
Centimeters:
B
Created by:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Measuring nature! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number. A: How tall do you think the flower is?
B
Inches:
Centimeters:
Using your ruler, how tall is the flower? Inches:
Centimeters:
B: How wide do you think the flower is? Inches:
A
Centimeters:
Using your ruler, how wide is the flower? Inches:
Centimeters:
C: How long do you think the flower’s leaf is?
C
Inches:
Centimeters:
Using your ruler, how long is the flower’s leaf? Inches:
Centimeters:
A: How tall do you think the tree is? Inches:
Centimeters:
Using your ruler, how tall is the tree? Inches:
Centimeters:
B
A
B: How long do you think the tree branch is? Inches:
Centimeters:
Using your ruler, how long is the tree branch? Inches:
Created by:
Centimeters:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Measuring on the Road! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number.
B C A A: How long do you think the truck is?
Inches:
Using your ruler, how long is the truck? B: How tall do you think the truck is?
Centimeters:
Inches:
Inches:
Using your ruler, how tall is the truck?
Centimeters:
Inches:
C: How tall do you think the truck’s tire is?
Centimeters:
Inches:
Using your ruler, how tall is the truck’s tire?
Centimeters:
Inches:
Centimeters: Centimeters:
A: How long do you think the motorcycle is? Inches:
Centimeters:
Using your ruler, how long is the
B
motorcycle? Inches:
Centimeters:
B: How tall do you think the motorcycle is? Inches:
Centimeters:
Using your ruler, how tall is the motorcycle? Created by:
A
Copyright © 2012-2013 by Education.com
Inches:
Centimeters:
More worksheets at www.education.com/worksheets
Measuring sports! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number. A: How long do you think the football is? Inches:
Centimeters:
Using your ruler, how long is the football? Inches:
C
Centimeters:
B: How wide do you think the football is? Inches:
Centimeters:
Using your ruler, how wide is the football? Inches:
A
Centimeters:
C: How long do you think the football laces are? Inches:
Centimeters:
B
Using your ruler, how long are the football laces? Inches:
Centimeters:
B A A: How long do you think the baseball bat is? Inches:
Centimeters:
Using your ruler, how long is the baseball bat? Inches:
Centimeters:
B: How long do you think the baseball bat grip is? Inches:
Centimeters:
Using your ruler, how long is the baseball bat grip? Inches: Created by:
Centimeters:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Grade
2
Rounding and Subtracting Estimating numbers makes you speedy! Round the numbers before subtracting. Remember, when rounding to the nearest ten: If the number in the ones place is 5 or greater, round up to the nearest ten. If the number in the ones place is 4 or less, round down to the nearest ten. Example: 18 20 14 10
Example
89 − 11 =
90 − 10
=
77 − 51 =
=
54 − 20 =
=
19 − 12 =
=
74 − 57 =
=
96 − 65 =
=
49 − 34 =
=
52 − 27 =
=
Copyright © 2009-2010 by Education.com
80
More worksheets at www.education.com/worksheets
Grade
2
Rounding and Subtracting Estimating numbers makes you speedy! Round the numbers before subtracting. Remember, when rounding to the nearest ten: If the number in the ones place is 5 or greater, round up to the nearest ten. If the number in the ones place is 4 or less, round down to the nearest ten. Example: 18 20 14 10
Example
91 − 62 =
90 − 60
=
65 − 24 =
=
87 − 66 =
=
70 − 52 =
=
98 − 89 =
=
83 − 71 =
=
99 − 20 =
=
42 − 33 =
=
Copyright © 2009-2010 by Education.com
30
More worksheets at www.education.com/worksheets
Grade
2
Rounding and Subtracting Estimating numbers makes you speedy! Round the numbers before subtracting. Remember, when rounding to the nearest ten: If the number in the ones place is 5 or greater, round up to the nearest ten. If the number in the ones place is 4 or less, round down to the nearest ten. Example: 18 20 14 10
Example
78 − 15 =
80 − 20
=
56 − 50 =
=
88 − 14 =
=
96 − 90 =
=
37 − 15 =
=
78 − 13 =
=
99 − 37 =
=
57 − 24 =
=
Copyright © 2009-2010 by Education.com
60
More worksheets at www.education.com/worksheets
Estimate the sums by rounding the numbers to the nearest hundred first and then adding them together. Don’t forget to show your work!
Hvwlpdwh"wkh"Vxp "543 .6:;
" 200 . 400 600
"45; .746
" .
"9;7 .578
" .
"654 .84;
" .
"79: .6:9
" .
";83 .438
" .
"<74 .556
" .
":87 .5;8
" .
Created by:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Sweet Estimation Estimate the sum by rounding each number to the nearest hundred. Show your work! 189 + 334
363 + 429
324 + 150
681 + 99
463 + 276
+
441 + 323
+
598 + 176
+
716 + 202
+
528 + 145
+
701 + 163
+
252 + 368
+
+
625 + 238
+
+
137 + 381
+
+
848 + 136
+
+
648 + 220
+
Created by :
Copyright 2008-2009 Education.com
www.education.com/worksheets
Magical Math Estimate the difference by rounding each number to the nearest hundred. Show your work! 608 372
481 115
225 88
797 273
321 148
507 284
834 375
654 283
253 72
449 132
363 180
883 329
719 285
917 432
692 231
Created by :
Copyright 2008-2009 Education.com
www.education.com/worksheets
Front-End Estimation Front-end estimation only uses the numbers in the very left column. If you are working with a 2 digit number, you will round to the nearest tens place, and if you are working with a 3 digit number, you will round to the nearest hundreds place.
Examples: 42 +17
75 +12
63 -37
563 +315
792 -134
Created by:
40 +20 60
+
96 +35
-
58 -21
+
231 +447
-
949 -381
263 -119
+
42 +56
-
93 -85
+
612 +289
-
417 -199
Copyright © 2012-2013 by Education.com
300 -100 200
+
87 +23
+
-
27 -16
-
+
876 +126
+
-
650 -511
-
More worksheets at www.education.com/worksheets
Round and Add! Round the numbers to the nearest tens and then add them together!
45
21
+
= 52
37
+
= 13
91
+
= 72
68
+ Created by:
#1
Copyright © 2012-2013 by Education.com
= More worksheets at www.education.com/worksheets
Round and Add! Round the numbers to the nearest tens and then add them together!
34
86
+
= 18
59
+
= 26
61
+
= 48
97
+ Created by:
#2
Copyright © 2012-2013 by Education.com
= More worksheets at www.education.com/worksheets
Round and Add! Round the numbers to the nearest hundreds and then add them together!
314
165
+
= 218
589
+
= 487
824
+
= 627
714
+ Created by:
#3
Copyright © 2012-2013 by Education.com
= More worksheets at www.education.com/worksheets
Great job! is an Education.com math superstar
5 or more, raise the score! 4 or less, let it rest!
Table of Contents Rounding and Estimation Wild Round-Up #1 Round 'Em Up! Wild Round-Up #2 Measuring on the Farm Measuring Food Measuring Nature Measuring on the Road Measuring Sports Rounding and Subtracting #1 Rounding and Subtracting #2 Rounding and Subtracting #3 Estimate the Sum Sweet Estimation Magical Math Front-End Estimation Round and Add #1 Round and Add #2 Round and Add #3
Certificate of Completion
Want more workbooks? Join Education.com Plus to save time and money. http://www.education.com/education-plus/ Copyright © 2013 Education.com. All Rights Reserved
Round the numbers to the nearest 10! If the ones number is 5 or greater, round up to the nearest 10. If the ones number is 4 or less, round down to the nearest 10.
18
Created by:
20
13
10
24
47
32
11
9
56
88
73
3
65
95
41
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Round ‘Em Up! Round the numbers to the nearest ten. Rounding to the nearest ten If the ones number is 5 or greater,round up to the nearest ten. Example: 17 If the ones number is 4 or less,round down to the nearest ten. Example: 12
56
31
18
43
12
27
35
67
48
61
73
86
79
84
24
52
20 10
Rounding to the nearest hundred If the tens number is 5 or greater,round up to the nearest hundred. Example:161 200 If the tens number is 4 or less,round down to the nearest hundred. Example:118 100
486
266
521
651
824
148
378
234
333
613
883
949
551
195
728
762
Here’s a little rhyme to help you remember how to round numbers: 5 or more, raise the score 4 or less, let it rest
Created by :
Copyright 2008-2009 Education.com
www.education.com/worksheets
Round the numbers to the nearest 100. If the tens number is 5 or greater, round up to the nearest 100. If the tens number is 4 or less, round down to the nearest 100.
185
200
136
100
315
475
136
722
97
556
818
361
228
685
165
998
Created by:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Measuring on the farm! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number.
A
C B
A: How long do you think the pig is?
Inches:
Using your ruler, how long is the pig? B: How tall do you think the pig is?
Centimeters:
Inches:
Centimeters:
Inches:
Using your ruler, how tall is the pig?
Centimeters:
Inches:
C: How long do you think the pig’s tail is?
Centimeters:
Inches:
Using your ruler, how long is the pig’s tail?
Centimeters:
Inches:
Centimeters:
A: How tall do you think the duck is?
B
Inches:
Centimeters:
Using your ruler, how tall is the duck?
A
Inches:
Centimeters:
B: How long do you think the duck’s neck is? Inches:
Centimeters:
Using your ruler, how long is the duck’s neck? Inches:
Created by:
Copyright © 2012-2013 by Education.com
Centimeters:
More worksheets at www.education.com/worksheets
Measuring food! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number.
A: How tall do you think the apple is?
B
Inches:
Centimeters:
Using your ruler, how tall is the apple? Inches:
A
Centimeters:
B: How long do you think the apple stem is?
C
Inches:
Centimeters:
Using your ruler, how long is the apple stem? Inches: C: How long do you think the apple seed is? Inches:
Centimeters: Centimeters:
Using your ruler, how long is the apple seed? Inches:
Centimeters:
A: How long do you think the peanut is? Inches:
Centimeters:
Using your ruler, how long is the peanut? Inches:
Centimeters:
B: How wide do you think the peanut is? Inches:
A
Centimeters:
Using your ruler, how wide is the peanut? Inches:
Centimeters:
B
Created by:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Measuring nature! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number. A: How tall do you think the flower is?
B
Inches:
Centimeters:
Using your ruler, how tall is the flower? Inches:
Centimeters:
B: How wide do you think the flower is? Inches:
A
Centimeters:
Using your ruler, how wide is the flower? Inches:
Centimeters:
C: How long do you think the flower’s leaf is?
C
Inches:
Centimeters:
Using your ruler, how long is the flower’s leaf? Inches:
Centimeters:
A: How tall do you think the tree is? Inches:
Centimeters:
Using your ruler, how tall is the tree? Inches:
Centimeters:
B
A
B: How long do you think the tree branch is? Inches:
Centimeters:
Using your ruler, how long is the tree branch? Inches:
Created by:
Centimeters:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Measuring on the Road! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number.
B C A A: How long do you think the truck is?
Inches:
Using your ruler, how long is the truck? B: How tall do you think the truck is?
Centimeters:
Inches:
Inches:
Using your ruler, how tall is the truck?
Centimeters:
Inches:
C: How tall do you think the truck’s tire is?
Centimeters:
Inches:
Using your ruler, how tall is the truck’s tire?
Centimeters:
Inches:
Centimeters: Centimeters:
A: How long do you think the motorcycle is? Inches:
Centimeters:
Using your ruler, how long is the
B
motorcycle? Inches:
Centimeters:
B: How tall do you think the motorcycle is? Inches:
Centimeters:
Using your ruler, how tall is the motorcycle? Created by:
A
Copyright © 2012-2013 by Education.com
Inches:
Centimeters:
More worksheets at www.education.com/worksheets
Measuring sports! First guess how long you think the measurements are. Then use your ruler to measure to the nearest whole number. A: How long do you think the football is? Inches:
Centimeters:
Using your ruler, how long is the football? Inches:
C
Centimeters:
B: How wide do you think the football is? Inches:
Centimeters:
Using your ruler, how wide is the football? Inches:
A
Centimeters:
C: How long do you think the football laces are? Inches:
Centimeters:
B
Using your ruler, how long are the football laces? Inches:
Centimeters:
B A A: How long do you think the baseball bat is? Inches:
Centimeters:
Using your ruler, how long is the baseball bat? Inches:
Centimeters:
B: How long do you think the baseball bat grip is? Inches:
Centimeters:
Using your ruler, how long is the baseball bat grip? Inches: Created by:
Centimeters:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Grade
2
Rounding and Subtracting Estimating numbers makes you speedy! Round the numbers before subtracting. Remember, when rounding to the nearest ten: If the number in the ones place is 5 or greater, round up to the nearest ten. If the number in the ones place is 4 or less, round down to the nearest ten. Example: 18 20 14 10
Example
89 − 11 =
90 − 10
=
77 − 51 =
=
54 − 20 =
=
19 − 12 =
=
74 − 57 =
=
96 − 65 =
=
49 − 34 =
=
52 − 27 =
=
Copyright © 2009-2010 by Education.com
80
More worksheets at www.education.com/worksheets
Grade
2
Rounding and Subtracting Estimating numbers makes you speedy! Round the numbers before subtracting. Remember, when rounding to the nearest ten: If the number in the ones place is 5 or greater, round up to the nearest ten. If the number in the ones place is 4 or less, round down to the nearest ten. Example: 18 20 14 10
Example
91 − 62 =
90 − 60
=
65 − 24 =
=
87 − 66 =
=
70 − 52 =
=
98 − 89 =
=
83 − 71 =
=
99 − 20 =
=
42 − 33 =
=
Copyright © 2009-2010 by Education.com
30
More worksheets at www.education.com/worksheets
Grade
2
Rounding and Subtracting Estimating numbers makes you speedy! Round the numbers before subtracting. Remember, when rounding to the nearest ten: If the number in the ones place is 5 or greater, round up to the nearest ten. If the number in the ones place is 4 or less, round down to the nearest ten. Example: 18 20 14 10
Example
78 − 15 =
80 − 20
=
56 − 50 =
=
88 − 14 =
=
96 − 90 =
=
37 − 15 =
=
78 − 13 =
=
99 − 37 =
=
57 − 24 =
=
Copyright © 2009-2010 by Education.com
60
More worksheets at www.education.com/worksheets
Estimate the sums by rounding the numbers to the nearest hundred first and then adding them together. Don’t forget to show your work!
Hvwlpdwh"wkh"Vxp "543 .6:;
" 200 . 400 600
"45; .746
" .
"9;7 .578
" .
"654 .84;
" .
"79: .6:9
" .
";83 .438
" .
"<74 .556
" .
":87 .5;8
" .
Created by:
Copyright © 2012-2013 by Education.com
More worksheets at www.education.com/worksheets
Sweet Estimation Estimate the sum by rounding each number to the nearest hundred. Show your work! 189 + 334
363 + 429
324 + 150
681 + 99
463 + 276
+
441 + 323
+
598 + 176
+
716 + 202
+
528 + 145
+
701 + 163
+
252 + 368
+
+
625 + 238
+
+
137 + 381
+
+
848 + 136
+
+
648 + 220
+
Created by :
Copyright 2008-2009 Education.com
www.education.com/worksheets
Magical Math Estimate the difference by rounding each number to the nearest hundred. Show your work! 608 372
481 115
225 88
797 273
321 148
507 284
834 375
654 283
253 72
449 132
363 180
883 329
719 285
917 432
692 231
Created by :
Copyright 2008-2009 Education.com
www.education.com/worksheets
Front-End Estimation Front-end estimation only uses the numbers in the very left column. If you are working with a 2 digit number, you will round to the nearest tens place, and if you are working with a 3 digit number, you will round to the nearest hundreds place.
Examples: 42 +17
75 +12
63 -37
563 +315
792 -134
Created by:
40 +20 60
+
96 +35
-
58 -21
+
231 +447
-
949 -381
263 -119
+
42 +56
-
93 -85
+
612 +289
-
417 -199
Copyright © 2012-2013 by Education.com
300 -100 200
+
87 +23
+
-
27 -16
-
+
876 +126
+
-
650 -511
-
More worksheets at www.education.com/worksheets
Round and Add! Round the numbers to the nearest tens and then add them together!
45
21
+
= 52
37
+
= 13
91
+
= 72
68
+ Created by:
#1
Copyright © 2012-2013 by Education.com
= More worksheets at www.education.com/worksheets
Round and Add! Round the numbers to the nearest tens and then add them together!
34
86
+
= 18
59
+
= 26
61
+
= 48
97
+ Created by:
#2
Copyright © 2012-2013 by Education.com
= More worksheets at www.education.com/worksheets
Round and Add! Round the numbers to the nearest hundreds and then add them together!
314
165
+
= 218
589
+
= 487
824
+
= 627
714
+ Created by:
#3
Copyright © 2012-2013 by Education.com
= More worksheets at www.education.com/worksheets
Great job! is an Education.com math superstar
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