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Why is it correct to write the sum of a number and 8 as either x plus 8 or 8 plus x but the difference of number and 8 must be written as x-8 and not 8-x?
Wiki User
∙ 12y ago
Think of x as a number
lets say that x is 5
so 8+5=13
5+8=13
however
5-8= -3 because i am taking away -8 from 5
8-5= 3 because i am taking away 5 from 8
in subtraction you need to be aware of the minus sign and what number to in front of it.
Wiki User
∙ 12y ago
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