Module 2 Topic F

Estimating

100

Estimate the answer of 14 x 23

10 x 20 = 200

200

Estimate the answer to 496 x 61

500 x 60 = 3,000

300

Estimate the answer to 47 divided by 24

40 divided by 20 = 2

400

Estimate the answer to 736 divided by 41

720 divided by 40 = 18 or 800 divided by 40 = 20

500

Estimate the answer to 2,946 divided by 63

3,000 divided by 60 = 500

Standard Algorithm

100

23 x 88

2,024

200

667 x 32

21,344

300

89 divided by 16

5 r9

400

388 divided by 29

13 r11

500

6,578 divided by 44

149 r22

Rounding

100

Round 13 to the nearest ten

10

200

Round 451 to the nearest hundred

500

300

Round 451 to the nearest ten

450

400

Round 18,937 to the nearest ten

18,940

500

Round 18,947 to the nearest thousand

19,000

Place Value

100

What is 10 x bigger than 12,000?

120,000

200

What is 12,000 divided by 10?

1,200

300

What is 700 x 1,000

700,000

400

what is 7,000 divided by 100

70

500

What is 145,000 divided by 1,000?

145

Exponents

100

What number is equal to 10²?

100

200

What number is equal to 10^4?

10,000

300

Write 1,000 as an exponent.

10³

400

Write 100,000 as an exponent

10⁵

500

What is 12 x 10⁴

120,000