Question

ii) Verify a – (–b) = a +b for the values of a = 21 and b = 18.​

Answer 1

Answer:

a+b=21+18=39. a+b=118-125=243. a+b=75+84=159

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Answer 2

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$it \: follows \: commutative \: property \\ a - ( - b) = a + b (a = 21 \: and \: b = 18) \\ 21 - ( - 18) = 21 + 18 \\ 21 + 18 = 21 + 18 \\ 39 = 39$