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Word Problems
Is this reasonable? Why or why not?
Rounding Decimals
Estimating Sums
& Differences
Adding and Subtracting Decimals
100
On Monday, Bonus Book Company earned $303.28. On Tuesday, the company earned $295.73. About how much did Bonus Book Company earn in all?
About $600
100
4.15 + 4.50 = about 7
Not reasonable
100
Round the decimal to the given place-value. 5.031; hundredths
What is 5.03
100
Estimate using rounding to nearest whole number. 38.23 + 11.84
What is 38 + 12 = 51
100
Add the decimals 43.28 + 31.45
What is 74.73
200
Abby has $38. She spent $29.37 on a new sweatshirt. How much does Abby have left?
$8.63
200
1.50 - 0.055 = 1.445

Reasonable

200
Round the decimal to the given place-value. 0.00042; ten-thousandths
What is 0.0004
200
Estimate using Rounding to nearest whole number 75.38 + 22.04
What is 75. + 22 = 97
200
Add the decimals 0.724 + 6.458
What is 7.182
300
Company A has a budget of $23.87 million and Company B has a budget of $14.22 million. What is the difference between the two budgets if each is rounded to the nearest tenth of a million?
$9.7 million
300

10.5 + 10.588 = about 20

Unreasonable

300
Round the decimal to the given place-value. 27.35; tens
What is 27
300
Estimate using rounding to nearest whole number 31.29 + 58.07
What is 31. + 58 = 89
300
Add the Decimals 1.325 + 0.081
What is 1.406
400
The coach recorded how fast his runners ran 1 mile. Luann ran a mile in 9.26 minutes, Anne ran a mile in 11.64 minutes, and Rubin ran a mile in 10.36 minutes. How much faster did Luann run than Rubin?
1.1 minutes
400

Jessica has $3.55 and needs $10 to buy lunch. He says that he needs 7.45 dollars to make up the difference.

Unreasonable

400
Round the decimal to the given place-value. 3.4553; thousandths
What is 3.455
400
Estimate by rounding to nearest whole number: 12.045 + 11.81 + 12.3 + 11.56
What is 12. + 12. + 12. + 12. = 48
400
Subtract the decimals 148.93 - 121.36
What is 27.57
500

Joe bought a pair of jeans for $49.99 and a shirt for $23.59. He received $6.42 in change. How much money did Joe have originally?

$80

500

8.799 - 7.111 = about 1

Unreasonable 

500
Round the decimal to the given place-value. 2.059; hundredths
What is 2.06
500
Estimate using rounding to nearest whole number 6.45 + 5.88 + 5.61 + 6.03
What is 6 + 6 + 6 + 6 = 24
500
Subtract the decimals 248 - 131.48
What is 116.72