Grade 8 Review #1

Integer +/-

100

-6+(-5)

-11

200

35+(-8)+(-12)

15

300

4-7-12+10-(-5)

-10

400

3-(-2)+l-7l

12

500

-6-(-4)+(-15)

-17

Integer x/÷

100

(3)(-4)(5)(2)

-120

200

(-3)(-5)(-7)

-105

300

-36÷ (-9)

-4

400

-4(-8)÷ (-2)

-16

500

36÷ (18÷ 2)x(-6)

-24

Exponents

100

(2^-2)^-3

2⁶ = 64

200

x⁴ + x⁷

x¹¹

300

4.26 x 10^-3

4.26 x 10⁵

0.00426

426,000

400

102.38 x 10³  in scientific notation

1.0238 x 10⁵

500

Is this answer going to be positive or negative? Do not solve.

l-3l³(-2³)(-59)^-4 / (34-4)²

negative

Simplify

100

4x²+3y-2x²-3y+3

2x²+3

200

3(2x+4y)+2(x-2y)

8x+8y

300

(3x²+5x-14)+(5x²+4x+11)

8x²+9x-3

400

2x(x-1)-3(2x-5)

2x²-8x+15

500

3(x+2(x-3))

9x-18

Word Phrase

100

17 more than twice a number

2x+17

200

the product of a number and 2 more than the number

n(n+2) or n²+2n

300

the quotient of a number and 4 less than the number

x/x-4

400

twice the opposite of a number is equal to the square of the number

-2n=n²

500

the ratio of a number and 4 times that number is equal to the ratio of 5 times the number and 95 more than the number

x / 4x = 5x / x+95