Ch. 1.5 - 1.9 Review

Adding Real Numbers

100

Will the answer be POSITIVE or NEGATIVE?

-162 + 164

2, positive

200

-9 + (-3) = ?

-12

300

^{| -8|  + (-16) = ?}

-8

400

-7/10 + (-3/5)

-13/10

500

-1.3 + [0.5 + (-0.3) + 0.4]

-0.7

Subtracting Real Numbers

100

4-9

-5

200

-2.6 - (-6.7)

4.1

300

-3/11 - (-5/11)

2/11

400

-10 - (-8) + (-4) - 20

-26

500

x = -5, y = 4, and t = 10

t² - x

105

Multiplying Real Numbers

100

-6(4)

-24

200

-3/4(-8/9)

2/3

300

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

-30

400

-7²

-49

500

(-2)(5) - (-11)(3)

41

Dividing Real Numbers

100

18/-2

-9

200

-45/-9

5

300

x = -5, y = -3

3x + 2y = ?

-21

400

-3 - 5²/2(-7)

2

500

x = -5, y = -3

2x² - y²

41

Properties of Real Numbers

100

Use commutative property.

2x + 13

13 + 2x

200

Use associative property.

3/4(4/3s)

(3/4 x 4/3) s

s

300

Use distributive property.

-(r - 3 - 7p)

-r + 3 + 7p

400

Use distributive property to make each product a sum.

(-1) x 5 + (-1) x y

-1(5+x)

500

Name the property illustrated.

-4(y + 7) = -4 x y + (-4) x 7

Distributive