Unit 3 Pre Algebra

One step equations

100

a+15=2

a=-13

200

n/5=9

n=45

300

-4k=-20

k=5

400

n/-6=-12

n=72

500

-16=r/-2

r=32

Scientific notations

100

(3 x 10²)x(7x10⁵)

2.1x10⁸

200

(1.8x10¹)x(7.2x10^-5)

1.296x10^-4

300

(8x10¹²)/(4x10⁴)

2x10⁸

400

(3.65x10^-5)/(9.6x10^-13)

3.75x10⁸

500

(8.1x10⁶)+(2.5x10⁵)

8.35x10⁶

Square roots

100

x²=36

x=6

200

x³=125

x=5

300

x²=529

x=23

400

100000000⁰=x

x=1

500

2¹⁴=x

x=16,384

Multi-step equations

100

8x+17=2x+35

 x=3

200

7k+8=2k-37

k=-9

300

-50-c=5c-2

c=-8

400

9a-7a=3a-33+2a

a=11

500

-8(p+2)+p=4(p+3)+5

p=-3

Rational Equations

100

a-17.9=32.4

a=50.3

200

15.3+n=14.7

n=-.6

300

.26n=1.95

n=7.5

400

1.6m=-9.44

m=-5.9

500

16=y/0.3

y=4.8