Question

Найди значение выражений:

(3 целых 1/5 - 1 целая 2/3) * 15

(5 целых 2/5 + 9 целых 1/6) : 19 целых 32/45

(2 целых 3/7 + 1 целая 1/2) : 5/7

(10 целых - 2 целых 2/3) : 4 целых 8/9


/ - дробь, : - разделить!

Answer 1

Пошаговое объяснение:

а)

(3 1/5 - 1 2/3) * 15 = (3 3/15 - 1 10/15) * 15 =

(3 18/15 - 1 10/15) * 15 = 2 8/15 * 15 =

38/15 * 15 = 38/1 * 1 = 38/1 = 38

б)

(5 2/5 + 9 1/6) : 19 32/45 =

(5 12/30 + 9 5/30) : 19 32/45 =

14 17/30 : 19 32/45 =

437/30 : 887/45 = 437/30 * 45/887 =

437/2 * 3/887 = 1311/1774

в)

(2 3/7 + 1 1/2) : 5/7 =

(2 6/14 + 1 7/14) : 5/7 =

3 13/14 : 5/7 = 55/14 * 7/5 =

11/2 * 1/1 = 11/2 = 5 1/2

г)

(10 - 2 2/3) : 4 8/9 =

(9 3/3 - 2 2/3) : 4 8/9

7 1/3 : 4 8/9 = 22/3 : 44/9 =

22/3 * 9/44 = 1/1 * 3/2 = 3/2 = 1 1/2