Решите 2/7+5/14;4/4-3/8;4/9+1/12

Question

Решите 2/7+5/14;4/4-3/8;4/9+1/12

Answer 1

2/7+5/14= 4/14+5/14= 9/14

4/4-3/8 = 8/8-3/8 = 5/8

4/9+1/12 = 16/36+3/36 = 19/36

Answer 2

2/7(*2)+5/14(*1)=4/14+5/14=9/14
4/4(*2)-3/8(*1)=8/8-3/8=5/8
4/9(*4)+1/12(*3)=16/36+3/36=19/36
*-это умножение сверху