Question

50 баллов! Помогите срочно решить!

2•(3+1/2)
18 7/11•9/39-5 7/11•9/39
8 7/10•3/25-3 7/10•3/25
2 9/37•10 4/15+26 11/15•2 9/37
6 13/24•7 1/2-6 5/24•7 1/2

Answer 1

Пошаговое объяснение:

2 * (3 + 1/2) = 2 * 3 1/2 = 2 * 7/2 = 14/2 = 7

18 7/11 * 9/39 - 5 7/11 * 9/39 =

9/39 * (18 7/11 - 5 7/11) = 9/39 * 3 = 27/39 = 9/13

8 7/10 * 3/25 - 3 7/10 * 3/25 =

3/25 * (8 7/10 - 3 7/10) = 3/25 * 5 = 15/25 = 3/5

2 9/37 * 10 4/15 + 26 11/15 * 2 9/37 =

2 9/37 * (10 4/15 + 26 11/15) = 2 9/37 * 36 15/15 =

83/37 * 37 = 83/1 * 1 = 83/1 = 83

6 13/24 * 7 1/2 - 6 5/24 * 7 1/2 =

7 1/2 * (6 13/24 - 6 5/24) = 7 1/2 * 8/24 =

15/2 * 8/24 = 5/1 * 4/8 = 20/8 = 2 4/8 = 2 1/2