Sawaal
426
Q:

Given interchanges : 

Signs + and - , numbers 4 and 8.

A) 4 + 8 - 12 = 12 B) 4 - 8 + 12 = 0
C) 8 + 4 - 12 = 24 D) 8 - 4 + 12 = 8

Answer:   B) 4 - 8 + 12 = 0



Explanation:

 On interchanging + and - and 4 and 8 in (b),

we get the equation as

8 + 4 - 12 = 0 
or 12 - 12 = 0
or 0 = 0, which is true.

Subject: Mathematical Operations
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