Вычислите:

1) А) 1/2+1/3+1/5
Б) 1/3+3/4+5/12
В) 3/5+5/6+1/2

2) А) 1/3-1/5-1/15
Б) 1/2-2/5-1/10
В) 7/8-1/4-1/2

3) А) 3 1/3+2 1/6
Б) 3/5+4 1/2
В) 1 3/7+2 1/2

4) А) 1 1/8-3/4
Б) 1 3/5-2/3
В) 2 1/6-1 3/4
ПОМОГИТЕ, ПОЖАЛУЙСТА
СТОЧНО!!! ​
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