2 целых 1/7 * 3 целых 1/9=?3/7*7/9=?5/8*1 ЦЕЛУЮ 13/15* 2 целых 2/7=?

Question

2 целых 1/7 * 3 целых 1/9=?
3/7*7/9=?
5/8*1 ЦЕЛУЮ 13/15* 2 целых 2/7=?

Answer 1

2'1/7*3'1/9=15/7*28/9=420/63=6'2/3
3/7*7/9=21/63=1/3
5/8*1'13/15*2'2/7=5/8*28/15*16/7=2240/840=2/3

Comments

5/8*1'13/15*2'2/7=5/8*28/15*16/7=2240/840=2'2/3