Patrick B. answered 05/01/19
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Math and computer tutor/teacher
Possibly, if there are enough summands of 1....
1+1+1+1+1+1+1+1+1+1 =
1+(1+1)+(1+1+1)+(1+1+1+1)= <--- associative property
1 + 2 + 3+ 4 =
4*5/2 = 10 <---- sum of the first end integers