Midterm Algebra 1

Rounding & Integers

100

5.3820 (hundredths)

8 + (-5)

5.38

3

200

7,983.12 (tens)

4 - 7 

7,980

-3

300

832.95870 (thousandths)

12 - (-2)

832.959

14

400

183.934 (ones)

5 x 9

184

45

500

90.457 (tenths)

99/(-9)

90.5

-11

PEMDAS

100

7² + (8 - 3) - 20

49 + 5 - 20

34

200

100 / 10 + 7 x 3 - 9

10 + 21 - 9 

22

300

9 x 3 / 3 + 5

9 + 5

14

400

(10 - 5) x 8 - 12 x 2

40 - 12 x 2

40 - 24

16

500

70 / 7 + 5² / 5

10 + 25 / 5

10 + 5

15

Algebraic Expressions

100

2 - 7k + 4k + 10

-3k + 12

200

-3k - 1 + 4 - 5k

-8k + 3

300

9k - 5 - 4k + 7

5k + 2

400

xy - 8  when x = 6 and y = 2

12 - 8

4

500

x + y² - 2x when x = 5 and y = 4

5 + 16 - 10

11

One and Two Step Equations

100

a + 5 = 8

a = 3

200

-10 = p / 7

p = -70

300

-26 = -6 - 2n

n = 10

400

y / 4 + 9 = 11

x = 8

500

16 = -8 + 4n

n = 6

Multi-Step Equations

100

-13 = 7 - 3n - n

n = 5

200

-25 = 5 + 5m - 10 

n= -4

300

-3(x + 1) = 7 - 5x

x = 5

400

3n - 5 = -8(6 + 5n)

n= -1

500

-8(a - 4) = 5a - 20

a = 4