Adding and Subtracting Decimals

Addition Properties

100

Name the Addition Property that is shown.

(17 + 2.7) + 18 = 18 + (17 + 2.7)

Commutative Property

200

Name the Addition Property that is shown.

56.5 + 32.8 = 56.5 + 38.2 + 0

Identity Property

300

Name the Addition Property that is shown.

27.8 + 0 = 27.8

 

Identity Property

400

Name the Addition Property that is shown.

19.5 + 19.1 = 19.1 + 19.5

Commutative Property

500

Name the Addition Property that is shown.

(14 + 29) + 18 = 14 + (29 + 18)

Associative Property

Adding Decimals

100

43.14 + 5.12 = 

48.26

200

114.73 + 68.1=

182.83

300

0.79 + 0.45 =

1.24

400

17.82 + 3.66 =

21.48

500

Jenna spent $7.75 at the arcade on Friday and $11.50 at the arcade on Saturday. How much money did Jenna spend altogether?

$19.25

Subtracting Decimals

100

20.8 - 7.34=

13.46

200

34.63 - 27.9=

6.73

300

15- 0.48=

14.52

400

87.4 - 38.821 =

 48.579

500

The coach recorded how fast his runners ran 1 mile.

Emmett ran a mile in 9.73 minutes, Kate ran a mile

in 10.87 minutes, and Robin ran a mile in 8.46 minutes. How many more minutes did Emmett run than Robin?

1.27 Minutes

Place Value

100

What number is in the hundredths place?

45.67

7

200

What number is in the ones place?

23.09

3

300

What number is in the tenths place?

9.12

1

400

What number is in the tens place?

76.9

 7

500

When you read a number with a decimal, what do you say when you see the decimal?

AND

Rounding/Estimating

100

Round 3.456 to the nearest hundredth

4.46

200

Round 9.12 to the nearest whole number

9

300

Round 7.352 to the nearest tenth

7.4

400

Estimate, then subtract

53.95 − 29.72

24

500

Estimate, then add. 

84.3 + 10.83

95