Question

предварительно сократив дроби, найдите значение выражения 3 / 12 + 25 / 30, 10/24-21/54,30/54+22/30,28/40-10/75,112/27+14/21,14/24-15/40,12/18-5/60,4/24+3/36

Answer 1

1/4+5/6=13/12;
5/12-7/18=1/36;
5/9+11/15=58/45;
7/10-2/15=17/30;
4  4/27+2/3=4  22/27;
7/12-3/8=5/24;
2/3-1/12=11/12;
1/6+1/12=1/4.