б) 12/13 · 26/27 = (12·2)/(1·27) = 24/27 = 8/9
в) 3 3/5 · 2 1/12 = 18/5 · 25/12 = (6·5)/(1·4) = 30/4 = 15/2 = 7 целых 1/2
г) 4 2/7 · 2 4/5 = 30/7 · 14/5 = (6·2)/(1·1) = 12
д) 2 5/8 · 4/21 = 21/8 · 4/21 = 4/8 = 1/2
е) 6/7 · 2 13/18 = 6/7 · 49/18 = (1·7)/(1·3) = 7/3 = 2 целых 1/3
Пошаговое объяснение:
12/13×26/27=312/351=8/9
3 3/5×2 1/12=450/60=15/2=7 1/2
4 2/7×2 4/5= 30/7×14/5=420/35=12
2 5/8×4/21=84/168=1/2
6/7×2 13/18=294/126=7/3=2 1/3
б) 12/13 · 26/27 = (12·2)/(1·27) = 24/27 = 8/9
в) 3 3/5 · 2 1/12 = 18/5 · 25/12 = (6·5)/(1·4) = 30/4 = 15/2 = 7 целых 1/2
г) 4 2/7 · 2 4/5 = 30/7 · 14/5 = (6·2)/(1·1) = 12
д) 2 5/8 · 4/21 = 21/8 · 4/21 = 4/8 = 1/2
е) 6/7 · 2 13/18 = 6/7 · 49/18 = (1·7)/(1·3) = 7/3 = 2 целых 1/3
Пошаговое объяснение:
12/13×26/27=312/351=8/9
3 3/5×2 1/12=450/60=15/2=7 1/2
4 2/7×2 4/5= 30/7×14/5=420/35=12
2 5/8×4/21=84/168=1/2
6/7×2 13/18=294/126=7/3=2 1/3