8th Grade Math Topic 1 Review

Rational or Irrational

100

Square root of 36

Rational (Terminating)

200

-4.232323...

Rational (Repeating)

300

19/2

Rational (Terminating)

400

0.246894643...

Irrational

500

0.151551555...

Irrational

Order Real #s

100

>, <, = : Square root of 144 ____ 11.999...

>

200

<, >, or = : Cube root of 27 ____ 3.33333... 

>

300

<, >, = : 0.252525... _____ Square root of 1

<

400

Order least to greatest: 2.333..., 2 1/4, square root of 8

2 1/4, 2.333..., square root of 8

500

Order least to greatest: 7.888..., square root of 56, 7 4/5

Square root of 56, 7 4/5, 7.888...

Square/Cube

100

x³ = 64

x = 4

200

x² = 49

x = +- 7

300

x³ = 25

x = Cube root of 25 or 2.92

400

x² = 125

x = +- Square root of 125 or +-11.18

500

x³=142

x³= Cube root of 142 or 5.22

Exponents

100

6⁴ x 6³

6⁷

200

(3⁶)²

3¹²

300

7³ x 2³

14³

400

4¹⁰ / 4⁴

4⁶

500

9^-4

1/9⁴

Scientific Notation

100

Write 803,000,000 in scientific notation

8.03 x 10⁸

200

Write 0.000000068 in scientific notation

6.8 x 10^-9

300

(2.8 x 10⁴) x (4 x 10⁵)

1.12 x 10¹⁰

400

(4.1 x 10⁴) + (5.6 x 10⁶)

5.641 x 10⁶

500

(6 x 10⁹) divided by (2.4 x 10³)

2.5 x 10⁶