Ответы и объяснения

2014-02-09T18:44:30+04:00
1) 4 2/3-2 5/8= 4 16/24-2 40/24=3 40/24-2 40/24= 1
2)1 5/7* 1= 12/7*1/1=12/7=1 5/7
3)1 5/7: 1 3/4= 12/7:7/4= 12/7*4/7=48/63
4)5/9 + 48/63= 70/126+ 96/126=136/126=1 10/126= 1 5/63