9x27+2x31-28
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9 x 27 + 2 x 31 - 28..... Multiplication sums are first so... 9 x 27 = 243 & 2 x 31 = 62.This gives the new sum of 243 + 62 - 28. Addition is next... 243 + 62 = 305.Finally... 305 - 28 = 277
2*100 + 31*10 + 27*1 = 200 + 310 + 27 = 537
The Least Common Multiple of 2, 27, 28 is: 756
54/56 = (2×27)/(2×28) = 27/28
-31