5.3 + 7.5 * 3 - 1 = 26.8
This answer was calculated according to the order of operations.
Rule 1: First perform any calculations inside parentheses.
Rule 2: Next, from left to right, do all multiplications and divisions.
Rule 3: Last, from left to right, do all additions and subtractions.
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Method 1: 75 - 31 = 44, half of 44 is 22 which is the smaller number so the larger is 53. Method 2: 75 = 38 + 37, difference 1. Add 15 to 38 and subtract 15 from 37 and you get 53 and 22. The choice is yours...
-22
The order is multiply, divide, add, subtract. 15x5 is 75. 570/75 is 7.6. 7.6+26 is 33.6
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1.2*6 = 7.2 75*3 = 225 -or- If you meant to add them together, then it'd be 232.2