Question

Найдите число,равное 20% от значения выражения (0.3-3/20)2*6/7+4/5:1.4

Answer 1

1) 0.3-3/20=3/10 - 3/20 = 6/20 - 3/20 = 3/20
2) 3/20*2*6/7 = 3/10*6/7 = 18/70
3) 4/5:1.4=4/(5*1,4) = 4/7
4) 18/70+4/7 = 18/70 + 40/70 = 58/70
5) 58/70 * 0,2 = 58/70 * 20/100 = 1160/7000 = 116/700 = 29/175
Ответ: 29/175