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Question

Mathematics Question on Subtraction of Integers with the help of a Number Line

Find
(a) 35 - (20)
(b) 72 - (90)
(c) (- 15) - (- 18)
(d) (-20) - (13)
(e) 23 - (- 12)
(f) (-32) - (- 40)

Answer

(a) 35–(20)=35−20=1535 – (20) = 35 - 20 = 15
(b) 72–90=−1872 – 90 = -18
(c) (−15)–(−18)=(−15)+(18)=3(- 15) – (- 18) = (-15) + (18) = 3
(d) (−20)–(13)=–(20+13)=–33(- 20) – (13) = – (20 + 13) = – 33
(e) 23–(−12)=23+12=35 23 – (- 12) = 23 + 12 = 35
(f) (−32)–(−40)=(−32)+40=8(- 32) – (- 40) = (- 32) + 40 = 8