Rounding
Estimating Sums
Estimating Differences
Sums and Differences
Ms. Z's Decimal Challenge
100

769.96 rounded to the nearest tenth

What is 770.00

100

Estimate to find the answer. The answer MUST be estimated.

8.9 + 6.1

What is 15

100

Estimate to find the answer. The answer MUST be estimated.

9.9 - 4.2

What is 6

100

3.12+14.16

What is 17.28

100

7 x 1.5

What is 10.5

200

89.43 rounded to the nearest whole number

What is 89

200

Estimate to find the answer. The answer MUST be estimated.

9.17+12.3

What is 21

200

Estimate to find the answer. The answer MUST be estimated.

17.9 - 6.3

What is 12

200

20.9 - 15.7

What is 5.2

200

1.45 x 1,000

What is 1,450

300

765.13 rounded to the nearest tenth

What is 765.1

300

Estimate to find the answer. The answer MUST be estimated.

75.8 + 3.5

What is 80

300

Estimate to find the answer. The answer MUST be estimated.

54.6 - 9.1

What is 46

300

98.54 - 16.4

What is 82.14

300

1.45 รท 100

What is 0.0145?

400

12,293.06 rounded to the nearest tenth

What is 12,293.1

400

Estimate to find the answer. The answer MUST be estimated.

108.5 + 211.9

What is 321

400

Estimate to find the answer. The answer MUST be estimated.

91.6 - 22.4

What is 70

400

10.8 + 843.57

What is 854.37

400

Ms. Zucker bought 3 boxes of candy and a bag of popcorn at the movie theater. Each boy of candy cost $2.25 and the bag of popcorn cost $3.76. How much did Ms. Zucker spend in all?

What is $10.51?

500

9,098.99 rounded to the nearest tenth

What is 9,099?

500

Estimate to find the answer. The answer MUST be estimated.

999.7 + 9.9

What is 1,010

500

Estimate to find the answer. The answer MUST be estimated.

89.5 - 15.08

What is 75

500

197.83 - 19.4

What is 178.43

500

Mrs. Dry collected $1.25 from twenty two students in her math class for a special project. How much money did she collect?

What is $27.50

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