Sixth Grade Challenging Math

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6-15)   Answer

                      1)   1 + 2 + 3 + 4 + 5 + 6 + 7 + (8 x 9) = 100
           2)   (1 + 2) x 3 + (4 x 5) + 6 + (7 x 8) + 9 = 100