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Real Numbers

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1. Find decimal notation for -4/25.
__x_a. -0.16
____b. -0.4
____c. -0.4
____d. -6.25

2. Find the absolute value: -/-6.8/.
____a. -8.6
____b. -6.8
__x_c. 6.8
____d. 8.6

3. Add: -6+12+(-5)+3
____a. -8
____b. 4
____c. 14
_x__d. 26

4. Add: -5/6 + 1/2
__x_a. 4/3
____b. 3/4
____c. -1/3
____d. -1/2

5. Find the opposite, or additive inverse, of 3/4.
____a. -4/3
_x__b. -3/4
____c. 1/4
____d. 4/3

6. Subtract: 3.1 - 9.6
_x__a. -6.5
____b. -5.5
____c. 12.7
____d. 29.76

7. Subtract: 4- (-11).
____a. -6.5
____b. -7
____c. 7
_x__d. 15

8. The lowest recorded temperature in Sweden is -38 C and the lowest recorded temperature in Russia is -68 C. How much higher is the low temperature in Sweden than the low temperature in Russia?
_x__a. 30 C
____b. 38 C
____c. 68 C
____d. 106 C

9. Multiply: -4/5 x (-3/8)
____a. -32/15
____b. -3/10
_x__c. 3/10
____d. 32/15

10. Find the reciprocal of -20.
____a. 400
____b. 20
____c. 1/20
_x__d. -1/20

11. Divide: -5/6 divide 7/12
____a. 10/7
____b. 35/72
____c. -35/72
__x_d. -10/7

12. Simplify: -3(12) - [5(-4) - 2^3]
____a. -64
____b. -24
____c. -8
_x__d. 8

13. Evaluate m/n, when m=10 and n=2
____a. 1/5
_x__b. 5
____c. 12
____d. 20

14. Factor: 18-3n.
____a. 3(6)
____b. 3(6-3n)
_x__c. 3(6-n)
____d. 6(3-n)

15. Solve: 9x = -63
____a. -72
____b. -54
_x__c. -7
____d. 7

16. Solve: 8t + 11 = 7t - 6
____a. 66
____b. 7/8
____c. 1
____d. -17
(this one is difficult to solve)

17. Solve: 0.1p + 2.1 = 4.6p - 1.9 + 0.5p
____a. -1.3
_x__b. 0.04
____c. 0.8
____d. 0.6875

18. Translate to an algebraic expression: Twenty less than some number.
_x__a. x - 20
____b. 20 - x
____c. 20x
____d. x + 20

19. the second angle of a triangle is two times as large as the first. The third angle is 10 degrees more than second angle. Find the measure of the first angle.
____a. 3.6
____b. 34
____c. 38
_x__d. 42.5

20. the perimeter of a rectangular writing pad is 28 inches. The length is 1 inch less than twice the width. Find the width.

____a. 8 inches
_x__b. 7 inches
____c. 6 inches
____d. 5 inches

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