Chapter 2 Review!

Estimation

100

What is an estimate for the equation 8x109?

8x100=800

200

What is an estimate for the equation 7x678?

7x700=4,900

300

What is the estimate for the equation 3x1326?

3x1000=3,000

400

What is the estimate for the equation 7395 X 8? Round to the nearest 10,000

60,000

500

What is the estimate for the equation 4x10865?

4x11000=44,000

Multiply by 10s, 100s and 1000s

100

Solve 9X50

450

200

Solve 8x800

6400

300

Solve 7x5000

35,000

400

Solve 6x8000

48,000

500

Solve 9x90000

810,000

Word problems

100

What operation does the phrase "times as many as" mean? 

multiplication

200

Takara is 4 years old. Her brother is 2 times as old as Takara.

Which equation can be used to find  b, the age in years of Takara’s brother?

b=4x2

300

Lin’s school bought 275 packages of pens. There are 6 pens in each package. How many pens did Lin’s school buy?

1,650

400

Kenji has 7 times as many baseball cards as Logan. Logan has 360 baseball cards.

Write an equation that can be used to find n, the number of baseball cards Kenji has?

n=360 X 7

500

This question has three parts.

A playground has a basketball court and a sandbox. The length of the sandbox is 18 feet.

Part A

The length of the basketball court is 5 times the length of the sandbox.

Write an equation that can be used to find b, the length in feet of the basketball court.

Part B

What is the length, in feet, of the basketball court? Show or explain how you got your answer.

Part C

The length of the playground is twice the length of the basketball court and the sandbox added together.

What is the total length, in feet, of the playground? Show or explain how you got your answer.

Part A. 18 X 5 = b

Part B. 90 feet

Part C. 216 feet

Multiply All the Digits!

100

9x24

216

200

4x905

3,620

300

9x876

7,884

400

8x4174

33,392

500

9x9999

89,991

Order of Operations

100

2+5x6

32

200

20-3x5+6

11

300

6x13+9x34-22

362

400

8x42+3x59-62

451

500

6÷3+50-8x5-2

10