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The answer is 163. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
87 + 87 = 174
348
9 plus 87 equals 96.
87 + 15 + 48 = 150
765
87+42+78 = 207
1 + 55 + 345 + 87 + 98 = 586
87 + 19 = 106
99 + 87 = 186
87+7= 94
34 + 98 + 98 + 87 + 32 = 349
It is: (-31+87)+3 = 59
24 + 63 = 87