Number Review (Grade 7 and 8)

Powers of Ten

100

9.473 x 1000

9 473

200

35.4 x 10

354

300

0.00987 x 1000

9.87

400

9873.42 x 0.001

9.87342

500

8.56 x 0.01

0.0856

Scientific Notation

100

4.9086 x 10⁴

49 086

200

5.9872 x 10⁸

598 720 000

300

9.8 x 10^-5

0.000098

400

Write this number in scientific notation: 0.00000000067

6.7 x 10¹⁰

500

Write this number in scientific notation: 5 550 555

5.550555 x 10⁶

Exponents

100

4⁸

65 536

200

What are the first 12 perfect square numbers?

1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144

300

Write in exponent form: 6x6x6x6x6x6

6⁶

400

√225

15

500

Write in exponent form: 4x4x4x4x5x5x5

4⁴ x 5³

Decimals

100

Round to the nearest tenth: 9.081

9.1

200

Order the decimals from least to greatest: 

4.76 ; 4.66 ; 4.701 ; 4.6

4.6 ; 4.67 ; 4.701 ; 4.76

300

Round to the nearest whole number: 9.999

10

400

Round to the nearest tenth: 1.987

2.0

500

Order the decimals from greatest to least:

0.981 ; 0.13 ; 0.992 ; 0.988

0.13 ; 0.981 ; 0.988 ; 0.992

Expanded Form

100

Write in expanded form: 56 783

50000 + 6000 + 700 + 80 + 3

200

Write in expanded form: 6 780 901

6 000 000 + 700 000 + 80 000 + 900 + 1

300

Write in expanded form using powers of 10: 7892

(7 x 10³) + (8 x 10²) + (9 x 10¹) + (2 x 10⁰)

400

Write in expanded form using powers of 10: 398 765

(3 x 10⁵) + (9 x 10⁴) + (8 x 10³) + (7 x 10²) + (6 x 10¹) + (5 x 10⁰)

500

Write in expanded form using powers of 10: 7 000 202

(7 x 10⁶) + (2 x 10²) + (2 x 10⁰)