Verified answer

1. [tex]=\frac{11-5}{12} =\frac{6}{12}=\frac{1}{2}[/tex]

2. [tex]=\frac{5+2}{14}= \frac{7}{14} =\frac{1}{2}[/tex]

3.[tex]=2\frac{7-1}{18} =2\frac{6}{18} =2\frac{1}{3}[/tex]

4.[tex]=7\frac{6+4}{15} =7\frac{10}{15} =7\frac{2}{3}[/tex]

Ответ:

1) 1/2   2) 1/2   3) 2 1/3   4) 7 2/3

Пошаговое объяснение:

1) 11/12 - 5/12

11-5/12

6/12

1/2

2)5/14+2/14

5+2/14

7/14

1/2

3) 3 7/18 - 1 1/18

(3-1)+(7/18-1/18)

2+1/3

2 1/3

4) 4 6/15 + 3 4/15

(4+3)+(6/15+4/15)

7+2/3

7 2/3