Question

1)Вычислите 115-95
2)Вычислите 769+1469+2869+5669
3)Вычислите 1342-314
4)Вычислите 240+250+370

Answer 1

1) 11/5-9/5=2/5
2) 7/69+14/69+28/69+56/69=(7+14+28+56)/69=105/69=35/23
3) 13/42-3/14=13/42-9/42=5/42
4) 2/40+2/50+3/70=к общ знамен 1400 =35*2/1400+2*28/1400+3*20/1400=70/1400+56/1400+60/1400=186/1400=93/700

Answer 2

1)2/5
2)105/69
3)36/14
4)