Find:
(a) 35 - (20)
(b) 72 - (92)
(c) (-15) - (-18)
(d) (-20) -(-13)
(e) 23 - (-12)
(f) (-32) - (-40)

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Solution

(a) 35-(20)
= 35-20
=15

(b) 72-(92)
= 72-92
=-20

(c) (-15)-(-18)
= -15+18
= 3

(d) (-20) -(-13)
= -20+13
= -7

(e) 23-(-12)
= 23+12
= 35
(f) (-32) -(-40)
= -32 +40
=8

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