math

powers of ten

100

7x10²

700

200

10x10x10x10x10x10x10

10⁷

300

7x10⁵

700,000

400

3x10⁸

200,000,000

500

12x10⁷

120,000,000

rounding decimals

100

what is 9.55 rounded to the nearest whole?

10

200

8.302 rounded to the nearest tenth

8.3

300

9.98 rounded to the nearest tenth

10

400

9.365 rounded to the nearest hundredths

9.4

500

375.936 rounded to the nearest tenth 

375.9

estimate the sum

100

9.0 +3.4 estimate the sum

12

200

54.099 +150.97 estimate the sum

205

300

754.637 - 537.959 estimate the sum

217

400

647.78+678.89 estimate the sum

1300

500

749.352 - 927.303 estimated to 200 resealable true or false

true

multiplication

100

4x25=

100

200

8x25

200

300

12x25

300

400

16x25

400

500

20x25

500

decimal addition

100

  6.6

+7.5

14.1

200

255.988 + 256.023

512.011

300

1.11 + 2.79

3.9

400

25.49 + 29.67

55.16

500

35.464+636.377

671.841