(1) Find
(a) 35 – (20)
=> 35 – 20
=> 15
(b) 72 – (90)
=> 72 – 90
=> -18
(c) (– 15) – (– 18)
=> -15 + 18
=> 3
(d) (–20) – (13)
=> -20-13
=> -33
(e) 23 – (– 12)
=> 23+12
=> 35
(f) (–32) – (– 40)
=> -32+40
=> 8
(2) Fill in the blanks with >, < or = sign.
(a) (– 3) + (– 6) ______ (– 3) – (– 6)
=> -9 & -3+6
=> -9 < 3
(b) (– 21) – (– 10) _______(– 31) + (– 11)
=> -21+10 & -31-11
=> -11 > -42
(c) 45 – (– 11) _____ 57 + (– 4)
=> 45+11 & 57-4
=> 56 > 53
(d) (– 25) – (– 42)_________ (– 42) – (– 25)
=>-25+42 ______ -42+25
=> 17 > -17
(3) Fill in the blanks.
(a) (– 8) + _____ = 0
=> -8 + 8 = 0
(b) 13 + ____= 0
=> 13 + (-13) = 0
(c) 12 + (– 12) = ______
=> 12 + (-12) = 0
(d) (– 4) +______ = – 12
=> (-4) + (-8) = -12
(e) ______ – 15 = – 10
=> (5) -15 = -10
(4) Find
(a) (– 7) – 8 – (– 25)
=> -7 – 8 + 25
=> -15 + 25
=> 10
(b) (– 13) + 32 – 8 – 1
=> -13 – 8 – 1 + 32
=> -22 + 32
=> 10
(c) (– 7) + (– 8) + (– 90)
=> -7 – 8 – 90
=> -15 – 90
=> -105
(d) 50 – (– 40) – (– 2)
=> 50 + 40 + 2
=> 92