(4 1/5 - 2 3/4) * 2 2/19 = 3 целых 1/19
1) 4 1/5 - 2 3/4 = 4 4/20 - 2 15/20 = 3 24/20- 2 15/20 = 1 9/20
2) 1 9/20 * 2 2/19 = 29/20 * 40/19 = (29*2)/(1*19) = 58/19 = 3 1/19
Пояснения:
1 9/20 = (1*20+9)/20 = 29/20
2 2/19 = (2*19+2)/19 = 40/19
(7 5/12 - 3 1/6) * 2 2/17 = 9
1) 7 5/12 - 3 1/6 = 7 5/12 - 3 2/12 = 4 3/12 = 4 1/4
2) 4 1/4 * 2 2/17 = 17/4 * 36/17 = (1*9)/(1*1) = 9
Пояснения:
4 1/4 = (4*4+1)/4 = 17/4
2 2/17 = (2*17+2)/17 = 36/17