Decimal Review

Expanded Form to Standard Form

100

(1 x 10) + (2 x 1) + (7 x 1/10)

12.7

200

(4 x 10) + (5 x 1/10) + (3 x 1/100)

40.53

300

(6 x 100) + (8 x 1) + (6 x 1/10) + (3 x 1/100) + (5 x 1/1,000)

608.635

400

(7 x 10) + (2 x 1) + ( 8 x 1/100) + (2 x 1/1,000)

72.082

500

(4 x 1,000) + (2 x 100) + (1 x 1) + (5 x 1/1,000)

4,201.005

Word Form to Standard Form

100

Two and seven tenths

2.7

200

Thirteen and nine hundredths

13.09

300

One hundred eight and five hundred fifty-two thousandths

108.552

400

Sixty-seven and twenty-three thousandths

67.023

500

One thousand seventy-two and six thousandths

1,072.006

Rounding

100

Round 0.46 to the nearest tenth

0.5

200

Round 0.829 to the nearest hundredth

0.83

300

Round 1.342 to the nearest whole number

1

400

Round 23.927 to the nearest tenth

23.9

500

Round 15.895 to the nearest hundredth

15.90

Adding Decimals

100

1.4 + 3.5 =

4.9

200

0.456 + 1.7 = 

2.156

300

4.38 + 13.2 = 

17.58

400

305.7 + 0.108 =

305.808

500

1,436.9 + 35.66 =

1,472.56

Subtracting Decimals

100

0.98 - 0.64 =

0.34

200

1.36 - 0.9 = 

0.46

300

2.5 - 1.07 = 

1.43

400

53.45 - 22.132 = 

31.318

500

437.96 - 24.155 =

413.805