Answer:
Because you add up and count
Explanation:
When you take specific number and add it another, that would be adding. first of all you need to say 8 first, because its a bigger number 8+5=13 then you subtract it by 6
8 + 5 - 6= 7
5 + 8 is not equal to 7
Because 5 + 8 = 13
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