1) 30:6=5(м/мин)
2) 95+5=100(м/мин)
Ответ: 100 м/мин скорость слона
5/7 : 2/7 = 5/7 * 7/2 = 5/2 = 2 1/2 = 2,5
Ответ:
1/15 - 1/30 = 2/30 - 1/30 = 1/30
3/10 - 2/15 = 9/30 - 4/30 = 5/30 = 1/6
1/6+8/9 = 3/18 + 16/18 = 1 1/18
3/5 + 0,4 = 0,6 + 0,4 = 1
23/45 + 13/30 = 46/90 + 39/90 = 85/90 = 17/18
1/4 + 0,5 = 0,25 + 0,5 = 0,30 = 0,3 или 3/10
3/4 + 1/6 = 9/12 + 2/12 = 10/12 = 5/6
13/14 - 5/42 = 39/42 - 5/42 = 34/42 = 17/21
1/8 - 1/16 = 2/16 - 1/16 = 1/16
7/12 + 11/18 = 21/36 + 22/36 = 42/36 = 1 6/36 = 1 1/6