Module 2 Review

Powers of 10

100

4.56 x 10²

456

200

Use a power of 10

56 ÷ ____ = 0.0056

10⁴

300

0.004 x 10²

0.4

400

785.32 ÷ 10³

0.78532

500

Use a power of 10

1.234 x ____ = 123.4

10²

Multiplication

100

2.3 x 5.6

12.88

200

0.342 x 1.5

0.513

300

80 x 300

24,000

400

8 x 0.003

0.024

500

(2 x 6) + (32 x 1.2)

50.4

Division

100

541 ÷ 5

108.2

200

212 ÷ 16

13.25

300

12 ÷ 300

0.04

400

1.608 ÷ 4

0.402

500

793.6 ÷ 128

6.2

Word Problems

100

Mr. Carbonell's Flan recipe calls for 8 eggs for 1 flan.  If he has 268 eggs, how many flans can he make?

33 whole flans, and a half

33.5

200

Michael has a collection of 1,404 sports cards.  He hopes to sell the collection in packs of 36 cards and make $633.75 when all the packs are sold. If each pack is priced the same, how much should Michael charge per pack?

$17.60 per pack

300

Hayley borrowed $1,854 from her parents.  She agreed to repay them in equal installments throughout the next 18 months.  How much will Hayley still owe her parents after a year?

$618

400

The area of a rectangle is 56.96 m^2,, if the length is 16 m, what is its perimeter?

39.12 m

500

A load of bricks is twice as heavy as a load of sticks.  The total weight of 4 loads of bricks and 4 loads of sticks is 771 kilograms.  What is the total weight of 1 load of bricks and 3 loads of sticks?

1 load bricks:  128.5 kg

3 loads of sticks:  192.75 kg

Estimation

100

Estimate by rounding first.

1.64 ÷ 22

1.60 ÷ 20 = 0.08

200

Estimate by rounding first.

123.8 ÷ 62

120.0 ÷ 60 = 2

300

Estimate by rounding first.

6.15 ÷ 31

6.0 ÷ 30 = 0.2

400

Estimate by rounding first.

85.2 ÷ 31

90 ÷ 30 = 3

500

Estimate by rounding first.

27.97 ÷ 28

27 ÷ 30 = 0.9