9+7+5+3+1
16+5+3+1
21+3+1
24+1
25
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1+2+3+4+5+6+7+8+9=37
5/7 + 3/7 = 1 1/7 or 8/7. Just add the top numbers then simplify!!
5.
7-4=3
The answer is -7. minus three plus one is minus two, adding a negative is the same as subtraction and so plus negative five means minus 5 so the sum is -2-5=-7 The Sum= -3+1-5 -2-5 -7