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It could be 87

7+8 = 15

Q: What is 8 add 7?

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76

its 30 because you add 8 and 7 then add it by itself or multiply it by 2**.**

(7*8)+(7+8) = 56+15 = 71

15

When you add 8 and 5 the sum will be 13. On the other hand when you add 6 and 7 the sum will be 13. That's why it's equal to 13.

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7+ 7/8=7 and 7/8 or 63/8 Get common denomenators by multiplying 7/1 by 8 to get 56/8. Add 56 and 7 to get 63/8... or 7 and 7/8.

You can, if you have a square with side 5 you can multiply 5*5=25 or you can add 5+5+5+5+5=25 If you want to do this just take one of the numbers and add it to itself the other numbers times. so if you have 7*8 you add 7 to itself 8 times, so add 8 7's 7+7+7+7+7+7+7+7=56 or add 7 8's 8+8+8+8+8+8+8=56 Multiplying is much easier.

you would add -7.

76

-15

21

7 + 8 * n

its 30 because you add 8 and 7 then add it by itself or multiply it by 2**.**

7 add 7 add 7 then you take away 12

(7*8)+(7+8) = 56+15 = 71

If you add 27 and 8, the answer is 35. 7 plus 8 is 15 and add it to 20, the answer is 35.

you multiply 8 and 4 and then add 7 to that answer