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Questions  >>  Olympiad-Math  >>  Class 10
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Q)

If a and b are two whole numbers, then commutative law is applicable to subtraction if and only if .

$(A) \; a=b \\(B)\; a= b \\(C)\; a > b \\(D)\;a< b $

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Solution :
Commutative law is applicable to subtraction if $a=b$
 
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A)

Now we think that:

a=23

b=23

So 23-23=0

Therefore,commutative law is only and only applicable to subtraction if and only if a=b

 

 

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