8th Grade Math

Mental Math

100

478 - 129

349

200

1234-567

667

300

(45 x 3) + 56

191

400

(12 x 3) + (11 x 4)

80

500

5²+10³​​​​

1025

Exponents

100

5⁰

1

200

3^-2

1/9

300

5² x 5³

5⁵

400

(5³)⁴

5¹²

500

5⁰ x 5⁴ x 5³ x 5⁷

5¹⁴

Scientific Notation

100

How do you write 1000 in scientific notation?

1 x 10³

200

2 x 10⁴ is what number in standard notation?

20,000

300

How do you write 23000 in scientific notation?

2.3 x 10⁴

400

Write 0.004 in scientific notation. 

4 x 10^-3

500

2.3450 x 10⁴ is what in standard notation?

23,450

Equations 1

100

x + 10 = 15

x = 5

200

3x + 2 = 14

x = 4

300

5 (x + 2) = 25

x = 3

400

3(2x+2) -6 = 18

x = 3

500

2(x-2) + 2(3x + 4) = 52

x = 12

Equations 2

100

5(2x+3) - 25 = 50

x=6

200

3x+5x-2x = 24

x=4

300

2(x+4)+4x = 32

x=4

400

6x + 3 = 5x - 2

x = -5

500

2(2x+4) = 2x - 16

x=-12