Unit 3: Lessons 15-18

Multiplying Decimals by a Whole Number

100

3 x 0.2 = ?

0.6

200

3 x 0.23 = ?

0.69

300

6 x 1.17 = ?

7.02

400

35 x 5.12 = ?

163.84

500

21 x 2.05 = ?

43.05

Multiplying Decimals by Decimals

100

0.3 x 0.12 = ?

0.36

200

4.4 x 1.1 = ?

4.84

300

0.3 x 12.1 = ?

36.21

400

1.9 x 2.78 = ?

5.282

500

4.2 x 3.21 = ?

13.482

Divide Decimals and Whole Numbers

100

0.88 ÷ 11 = ?

0.08

200

5.6 ÷ 8 ?

0.7

300

5 ÷ 0.2 = ?

25

400

96.16 ÷ 8 = ?

12.02 

500

Haley is sewing a dress for the 5th grade dance. She needs 25.35 inches of fabric to make 5 ruffles for her dress. How much of the fabric does each ruffle require?

Each ruffles requires 5.07 inches of fabric. 

Dividing Decimals by tenths and hundredths

100

2.4 ÷ 0.4 = ?

6

200

0.32 ÷ 0.4 = ?

0.8

300

1.8 ÷ 0.09 = ?

20

400

0.36 ÷ 0.06 = ?

6

500

Jezabel is buying ribbons to make a headband. Each ribbon costs $0.06. If she spent $6.36, how many ribbons did she buy?

6 

Division as Fractions

100

8 ÷ 3 = ?

8/3

200

Aiden has 8 pounds of fish food for his brand new Beta fish. He plans to give his fish the same amount of food for 51 days. How much of the food will the Beta fish get each day?

8/51

300

Draw a model to show 3 ÷ 5 and answer the problem. 

3/5

400

Darian has 4 bags of dinosaur erasers. He wants to share the bag of erasers equally amongst himself and 5 friends. How much of the bags of erasers does each person get?

Draw an accurate model to represent the situation and have the correct answer.

4/6

500

Explain how division is like fractions. 

A fraction is another way of writing division. The top number (numerator) is what you are dividing, and the bottom number (denominator) is how many parts you divide it into.

For example: 

7 ÷ 4 = 7/4