55 times 4 is 220. To do the problem mentally, turn 55 into 50 + 5 and do it this way:
4(50 + 5)
Distribute:
4(50) + 4(5)
Solve:
200 + 20 = 220.
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4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4...(55 times) / 4 = 55
4 goes into 55 thirteen times with a remainder of three.
8/11 + 4/5 = 40/55 + 44/55 = 84/55 or 129/55
110
4 times, with a remainder of 55.