Math Review

Multiplication

100

94 x 26

2,444

200

852 x 16

13,632

300

625 x 94

58,750

400

Stephanie was baking cookies for a bake sale. She made 39 dozen cookies. How many total cookies did she make for the bake sale? 

468 cookies

500

Stacey and her sister wanted to make necklaces to sell at a craft fair. They used 293 beads for each necklace. If they made 156 necklaces, how many beads did they use? 

45,708 beads 

Division

100

7,845 / 5

1,569

200

264 / 12

22

300

364 / 26

14

400

6,724 / 16

(Decimal Division)

420.25

500

8,462 / 16

(Decimal Division)

528.875

Powers of 10

100

True or False 

When we multiply a number by a power of 10 the digits move to the left and the decimal moves to the right. When dividing, it's the opposite. 

True

200

9,245 x 10²

924,500

300

8,594.1 / 10³

8.5941

400

935.28 x 10⁴

9,352,800

500

28,019 / 10²

280.19

Rounding

100

What is 2,930 rounded to the nearest hundred? 

2,900

200

What is 27.091 rounded to the nearest hundredth? 

27.09

300

What is 19,801 rounded to the nearest thousand? 

20,000

400

What is 923.095 rounded to the nearest whole? 

923

500

What place value do you look at when rounding any number? 

The place value to the right of the one you're rounding to. 

Comparing Numbers

100

923.02 _____ 923.2

<

200

13.902 _____ 139.02

<

300

82.31 _____ 82.013

>

400

82 tenths _____ 8.2

=

500

5 35/100 _____ 5.350

=