Вычислите ( 4/11 - 12/55 ) * 7 7/10

1,12

Пошаговое объяснение:

(4/11-12/55)* 7 7/10

1) 4/11-12/55=20/55- 12/55=8/55

8/55*7 7/10=8/55*77/10=616/550=28/25=1 3/24=1,12

( 4/11 - 12/55 ) · 7 7/10 = 1 3/25;

1.4/11 - 12/55 = 4·55/11·55 - 12·11/55·11 = 220/605 - 132/605 = 220 - 132/605 = 88/605 = 8·11/55·11 = 8/55;

2.8/55 · 7 7/10 = 8/55 · 7 · 10 + 7/10 = 8/55 · 77/10 = 8 · 77/55 · 10 = 616/550  = 28 · 22/25 · 22 = 3 + 1 · 25/25 = 1 3/25;