Adding and Subtracting Decimals- module 14

Adding Decimals

100

.4 + .5 = ?

.9 

200

.74 + .4 = ? 

1.14 

300

1.05 + .25 = ? 

1.3 

400

6.782 + 4.395 = ? 

11.177

500

52.214 + 34.423 = ? 

ESTIMATE TOO! 

Answer:  86.637 

Estimate: 52+34=86

Subtracting Decimals

100

0.8 - 0.3 = ? 

.5 

200

4.5 - 2.3 = ? 

2.2 

300

5.3 - 3.86 = ? 

1.44 

400

8 - 6.99 = ? 

1.01 

500

132.43 - 88.14 = ? 

44.29 

Word Problems

100

Mariah buys an apple for $.58 and an orange for $.74. How much does she pay for the fruit? 

$1.32 

200

Jonathan walks 2.54 km to the park and then walks 1.7 km to the store. What is the total distance he walks? 

4.23 km 

300

Kathy goes on a 4.5 mile hike. After 1 hour, the trail tells Ruby she hiked 3.14 miles. How much farther does she have to hike? 

1.36 miles 

400

Jayla went shopping for school supplies. A binder costs $2.68. A book costs $5. How much MORE does a book cost than a binder? 

$2.32 

500

Jessie wants to buy a new coat! The coat costs $89.95 BUT Jessie has a coupon that takes off $10.50 of the original price. How much will the coat costs if Jessie uses his coupon? 

$79.45

Reasonable Estimates

100

Write an equation that is a reasonable estimate of 1.64+3.12

2 + 3 = 5 

200

Write an equation with a reasonable estimate for 

6.32 - 2.91

6 - 3 = 3 

300

Write an equation with a reasonable estimate of 

8.8 + 0.9 = 

9 + 1 = 10 

400

Write a reasonable estimate for 2.83 - 1.19 

3 -1 = 2 

500

Write a reasonable estimate for 9.1 - 6.21

9 - 6 = 3 

REVIEW

100

3/5 x 3/4 = ? 

9/20 

200

2/6 x 4/8 = ? 

8/48

300

Compare (greater than, less than, equal) 

 76.924             76.931 

76.924       <      76.931

400

.4 x 10 = ? 

4 

500

.04 x 1/10 = ? 

.004