Unit 3 - Decimals

Adding

100

0.4+0.02

0.42

200

0.27+9.95

10.22

300

18.905+37.44

56.345

400

1.23+45.6+0.789

47.619

500

You go to a store and buy a game for $14.95, a snack for $3.42, and a shirt for $18.50. You pay with a $50.00 bill. How much did you spend at the store?

$36.87

Subtracting

100

1.3-0.4

0.9

200

6.03-5.26

0.77

300

15.103-9.47

5.633

400

65.4 - (42.7 - 11.86)

34.56

500

There are 19.3 cups of flour in a bag. The chef uses 2.9 cups for making cookies. Then, he uses 1.2 cups of sugar and 5.1 cups of flour for making banana bread. How many cups of flour are left?

19.3 – 2.9 – 5.1 = 11.3

11.3 cups of flour are left

Multiplying

100

0.33*2

0.66

200

4.9*0.005

0.0245

300

67.9*0.32*0.025

0.5432

400

(0.13+0.095)*(53-52.66)

0.0765

500

Laura sold 4 hats at $12.50 each. Then she used all of her money to buy 8 pairs of socks. What was the price of each pair of socks?

$6.25

Dividing

100

5.16/1.2

4.3

200

0.0258 ÷ 0.6

0.043

300

0.805 ÷ 2.5

0.322

400

0.0968 ÷ 2.5

0.03872

500

At a fabirc store, 12 yards of burlap fabric costs $57 and 15 yards of cotton costs $78.92. Which fabric costs more per a yard? How much more?

Cotton costs more. It costs $0.05 more

Metric System

100

Convert 10 cm to meters

1 meter

200

Convert 4.567 kg to grams

4567 grams

300

Convert 9.28 cm to m

0.0928 m

400

Convert 5920 ml to kiloliters

0.00592

500

Stephanie is 1.6 meters tall. Her sister, Jacqueline, is 4 cm taller than her. How tall is Jacqueline in meters?

1.64m