Pre-Algebra Demystified

7. Add 17þð
   3 Þþð
   2 Þþ5.
   (a) 17
   (b) 27
   (c)
   17
   (d)
   20


8. Subtract
   12
   3.
   (a)
   9
   (b)
   15
   (c) 9
   (d) 15


9. Subtract
   5
   ð
   9 Þ.
   (a) 4
   (b) 14
   (c)
   45
   (d)
   14


10. Subtract 18
    ð
    5 Þ.
    (a) 13
    (b) 23
    (c)
    23
    (d)
    13


11. Simplify 8
    3 þ 2
    7
    5.
    (a) 25
    (b)
    19
    (c)
    5
    (d) þ 5


12. Multiplyð
    9 Þ(6).
    (a)
    54
    (b)
    15
    (c) þ 54
    (d) þ 15


13. Multiplyð
    7 Þ(þ9).
    (a) 63
    (b) 72
    (c)
    16
    (d)
    63


14. Multiplyð
    8 Þð
    3 Þ(þ4)ð
    2 Þ(5).
    (a)
    720
    (b)
    960

36 CHAPTER 2 Integers