Объяснение:
8) 2 3/8+4 1/6 =2 9/24+4 4/24=6 13/24
9) 6-1 3/5 =4 2/5
10) 4 2/7- 1 4/9=4 18/63-1 28/63=2 53/63
11) 8 3/4•1 3/14 =35/4*17/14=85/8=10 5/8
12) 1 3/5:5 1/3 =8/5*3/16=3/10
Объяснение:
8) 2 3/8+4 1/6 =2 9/24+4 4/24=6 13/24
9) 6-1 3/5 =4 2/5
10) 4 2/7- 1 4/9=4 18/63-1 28/63=2 53/63
11) 8 3/4•1 3/14 =35/4*17/14=85/8=10 5/8
12) 1 3/5:5 1/3 =8/5*3/16=3/10