Decimals Review Unit Two

Place Value

100

In 9.81, what place is the 1 in?

Hundredths 

200

In 28.465, what place is the 8 in?

Ones

300

129.879 What is the place value of the 7?

Hundredths

400

In 1.203 what place is the 2 in?

Tenths 

500

In 93.425, what place is the 5 in?

Thousandths 

Multiplying by 10, 100, 1000

100

12.1 x 100 =

1,210

200

9,563 x 10 =

95,630

300

52.1 x 1,000 =

52,100

400

0.321 x 100 =

32.1

500

59.8 x 1,000 =

59,800

Adding Decimals

100

Add these decimals: 21.74 + 8.27

30.01

200

Add these decimals: 6.125 + 18

24.125

300

Add these decimals: 5.2 + 3.11

8.31

400

Add these decimals: 17 + 9.54

26.54

500

Add these decimals: 4.67 + 29.1

33.77

PEMDAS

100

13 + 9/3 x 2 = 

19

200

8 x (4 + 6) - 2

78

300

8 + 5 x 3 - 6

17

400

7 x 9 - 3 x 2

57

500

[6 + 7 x 2] - 8 x 2

4

Subtracting Decimals

100

Subtract these decimals: 851.701 - 312.49

539.211

200

Subtract these decimals: 10.71 - 0.7

10.01

300

Subtract these decimals: 547.612 - 3.107

544.505

400

Subtract these decimals: 9.034 - 0.095

8.939

500

Subtract these decimals: 1.72 - 0.8

0.92

Number Forms

100

Write the following number in word form:

56.84

fifty-six and eighty four hundredths

200

Write the following number in expanded form:

12.563

10 + 2 + 0.5 + 0.06 + 0.003

300

Write the following number in standard form:

Thirty-six and two hundred eleven thousandths

36.211

400

Write the following number in word form: 

308.571

Three hundred eight and five hundred one thousandths

500

Write the following number in standard form

(4 x 10) + (3 x 1) + (6 x 1/100) + (3 x 1/1000)

43.063