Unit 3 Summative Review

Finding 10 x's and 1/10 of a number

100

What number is 10x's   45.68 ?

456.8

200

What is 1/10 of  7.2  ?

.72

300

835.6 is 10x's what number?

83.56

400

8.3 is 1/10 of what number?

83

500

6 is 1/10 of what number?

60

Addition and Subtraction of Decimals

100

3.7 + 58.1 = ?

61.8

200

47.13  -  26.05 = ?

21.08

300

582.1  +  15.79  = ?

597.89

400

38.14  -  19.712  = ?

18.428

500

467.32  - 319.41. = ?

147.91

Inverse Operations

100

What is the Inverse Operation of:

3.47  +  5.9 = M

9.37  -  5.9 = 3.47 

OR

9.37  -  3.47  = 5.9

200

What is the Inverse Operation of:

43.21  -  21.01 = M

22.20 + 21.01 = 43.31

OR

21.01 + 22.20 = 43.21

300

What is the Inverse Operation of:

85.45  +  39.7 = M

125.15  -  39.7  =  85.45

OR

125.15  -  85.45  =  39.7

400

What is the Inverse Operation of:

732.6  -  124.41  = M

608.19  +  124.41 =  732.6

OR

124.41  +  608.19  =  732.6

500

What is the Inverse Operation of:

907   -  624.31 = M

282.69  +  624.31  =  907

OR

624.31  +  282.69  = 907

Estimation of Decimals

100

Round to the nearest whole number (ones place) and estimate to find the answer.

HINT: only need to estimate

34.7  +  15.4  = ? (estimate)

35  +  15 = 

30

200

Round to the nearest whole number (ones place) and estimate to find the answer.

HINT: only need to estimate

941.3  -  430.2  = ? (estimate)

941  -  430  =

511

300

Round to the nearest whole number (ones place) and estimate to find the answer.

HINT: only need to estimate

85.17  +  38.52  = ? (estimate)

85  +  39  =

124

400

Round to the nearest whole number (ones place) and estimate to find the answer.

HINT: only need to estimate

2.43  +  5.76  = ? (estimate)

2  +  6  = 

8

500

Round to the nearest whole number (ones place) and estimate to find the answer.

HINT: only need to estimate

1,243.74  +   929.83  = ? (estimate)

1244  +  930  = 

2174

Word Problems

100

A'Saysha earned $5.25 babysitting on Monday and 12.75 on Wednesday.  How much money did she earn babysitting in all?

A'Saysha earned $18.00 in all.

200

Lydia got $28.50 for her birthday from her friends. She spent 15.83 on a new video game.  How much money did she have left?

Lydia had $12.67 left.

300

Raine walked 4.6 miles on Tuesday and 3.9 miles on Wednesday. How many miles did Raine walk in all?

Raine walked 8.5 miles in all.

400

Avery cut her piece of ribbon 21.4 inches long.  Tenley cut her ribbon to 19.6 inches long.  How much longer is Avery's ribbon than Tenley's ribbon.

Avery's ribbon is 1.8 inches longer.

500

Allie had $50.00 when she went to Target.  She spent $15.76 on a shirt and $21.87 on a pair of shorts.  How much money did she have left after paying for her shirt and shorts?

$12.37