Ответы и объяснения

2014-02-19T10:32:22+04:00
1) 3/5 * 2_1/2 = 3/5 * 5/2 = 3/2
2) 2_1/2 - 3/2 = 5/2 - 3/2 =2/2 =1
3) 1 : 7/10 = 10/7
4) 10/7 + 1_5/6=10/7+11/6 =137/42=3_11/42