Вычислите(1*1/4-2*1/2*3/5):4/5

Question

Вычислите(1*1/4-2*1/2*3/5):4/5

Answer 1

(1 * 1/4 - 2 * 1/2 * 3/5) : 4/5 = -7/16
1) 1 * 1/4 = 1/4
2) 2 * 1/2 = 1
3) 1 * 3/5 = 3/5
4) 1/4 - 3/5 = (5*1 - 4*3)/20 = -7/20
5) -7/20 : 4/5 = -7/20 * 5/4 = -7/16