1)
1 1/5 + 3 2/3 = 1 3/15 + 3 10/15 = 4 13/15,
2)
3 1/5 - 1 3/5 = 2 6/5 - 1 3/5 = 1 3/5,
3)
5/6 от 120 = 5/6 * 120 = 5 * 20 = 100
1)
1 1/5 + 3 2/3 = 1 3/15 + 3 10/15 = 4 13/15,
2)
3 1/5 - 1 3/5 = 2 6/5 - 1 3/5 = 1 3/5,
3)
5/6 от 120 = 5/6 * 120 = 5 * 20 = 100
2)3 1/5- 1 3/5= 2 6/5-1 3/5=1 3/5
3)???