2.1-2.5 Review

Number Categories

100

What type of number is 6?

Natural, Whole, Integer, Rational, Real

200

What type of number is 0?

Whole, Integer, Rational, Real

300

What type of number is the square root of 3?

Irrational, Real

400

What type of number is the square root of 121?

Natural, Whole, Integer, Rational, Real

500

What type of number is -.33333...?

Rational, Real

Adding and Subracting

100

-8.7 + 4.2

-4.5

200

8 2/3 + (-6 3/5) + 3 1/4

5 19/60

300

Evaluate when x = 7.1 and y = -2.5

x - (-6) + y

10.6

400

Evaluate when x = 3.6, y = 6.6, and z = -11

x - |y-z|

-14

500

Evaluate for x = -3 1/3

|x| + (-3 1/4) + 7 3/10

7 23/60

Multiplying

100

-8(-4)(-2.5)

-80

200

18(-2/3)(-1/5)

12/5

300

Evaluate when x = -2 and y = 3.6

2x + y

-.4

400

Evaluate when x = -2 and y = 3.6

1.5x - |-y|

-6.6

500

An investor purchases 50 shares of a stock at $3.50 per share. The next day, the change in the value of a share of the stock is -$.25. What is the total value of the shares the next day?

$162.50

Properties of Numbers

100

Name the property:

(x*7)*0.5 = x*(7*0.5)

Associative Property of Multiplication

200

1*6 = 6

Multiplicative Identity

300

(-2*5)*4 = (5 *-2)*4

Commutative Property of Multiplication

400

0 + (-9) = -9

Additive Identity Property

500

(2 + 3) +4 = 2 + (3 + 4)

Associative Property of Addition

Distributive Property

100

Simplify:

15t -(t-4)

14t + 4

200

3(2-c)-c

6-4c

300

-6(v+1) + v

-5v - 6

400

6(5-z) + 2z

30 - 4z

500

(s-3)(-2) + 17s

15s + 6