Question

Вычислить
4,(36)-1/5

Answer 1

4.(36) = x
436.(36) = 100x
100x - x = 436.(36) - 4.(36)
99x = 432
x = 432/99 = 48/11
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4.(36) - 1/5 = 48/11 - 1/5 = (240 - 11)/55 = 229/55
или
4.(36) - 1/5 = 4.(36) - 0.2 = 4.16(36)