Chapter 5 Math Review

Patterns

1

215 x 1       =

215 x 0.1    =

215 x 0.01  =

215 x 0.001=

215.0

21.5

2.15

0.215

2

3452 divided by 10⁰

3452 divided by 10¹

3452 divided by 10²

3452 divided by 10³

3452.0

345.2

34.52

3.452

3

800 divided by 1

800 divided by 0.1

800 divided by 0.01

800

8,000

80,000

4

345 divided by 100

3.45

5

62.4 divided by n = 0.624. What is n equal to?

n = 100 or 10²

Decimal division

1

1.4 divided by 0.2

7

2

0.64 divided by 0.08

8

3

1.48 divided by 0.74

2

4

3.45 divided by 1.5

2.3

5

Josiah bought carrots for $0.79 per pound, if he paid $3.95 in total how many pound of carrots did he buy?

5 pounds

Decimal divided by whole numbers

1

9.28 divided by 2

4.64

2

86.13 divided by 11

7.83

3

96.12 divided by 4

24.03

4

226.8 divided by 14

16.2

5

25.2 divided by 8

3.15

Word problems

1

Elena spent $28.15 for 2 headphones, the sales tax was $2.55. If each headphones costs the same amount, how much did each headphone cost?

Each headphone cost $12.80

2

Sofia spent $5.80 for school supplies. She spent $3.00 for a notebook and $1.75 for a pen. She also bought 3 large erasers. If each eraser had the same cost, how much did she spend for each eraser?

35 cents or $0.35

3

Marilyn's family spent $76 at the circus. They spent $12 for popcorn, $14 for drinks, and the rest for 4 tickets. How much did each ticket cost?

$12.50

4

Juliana has a ribbon that is 2.2 meters long. She cuts the ribbon into 4 equal pieces. What is the length of each piece of ribbon?

0.55 meter

5

A car travels 168 miles in 3.2 hours. Find the car's rate of speed in miles per hour. (hint: how far does the car go in one hour?)

52.5 miles per hour

Mystery

1

Model to find the quotient of 1.5 divided by 5.

5 groups of 5 tenths should be shown to receive the points. 

The quotient is 5.

2

Elias has $1.60 in dimes. How many stacks of $0.40 can he make? (Hint: a dime is $0.10)

Elias can create 4 groups

3

Katheryne spent $34.45 for gems, paint, and 4 brushes. The gems cost $8, the paint cost $10.50, and the brushes cost $3.50 each. How much was the sales tax?

$1.95

4

Olivia can ride her bike 4.5 kilometer in 9 minutes. How far can she go in 1 minute?

0.5 kilometers.

5

Madeline's family live 896 kilometers from the beach. Each of the 5 adults drove the family an equal distance to get to the beach. How far did each adult drive?

179.2 kilometers