108
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X/27 = 4 Multiply both sides by 27: X = 4*27 = 108
x2 = 9, 3 x 9 = 27, 27 - 4 = 23
4 x 20 = 80 4 x 7 = 28 80 + 28 = 108 4 x 27 = 108
x=4
Here are two ways you can find the answer in your head: I don't really know my 27 times tables very well, but I know that 27 is 3 x 9, and 4 x 3 is 12, and I do know my 12 times tables, so I take the 3 from the 27 and multiply it by the 4. 4 x 27 = 4 x 3 x 9 = 12 x 9 = 108 The other way is to change 27 into 25 + 2 and multiply each addend by 4. 4 x 27 = 4 x (25 + 2) = (4 x 25) + (4 x 2) = 100 + 8 = 108