(5 3/7 - 3 2/5) + (3 - 1 17/35) - (4 - 12/15 - 3 19/105) = 3 целых 11/21.
1) 5 3/7 - 3 2/5 = 5 15/35 - 3 14/35 = 2 1/35
2) 3 - 1 17/35 = 2 35/35 - 1 17/35 = 1 18/35
3) 4 - 12/15 = 3 15/15 - 12/15 = 3 3/15 = 3 1/5
4) 3 1/5 - 3 19/105 = 3 21/105 - 3 19/105 = 2/105
5) 2 1/35 + 1 18/35 = 3 19/35
6) 3 19/35 - 2/105 = 3 57/105 - 2/105 = 3 55/105 = 3 11/21
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(7 7/9 - 5 1/3) - (2 - 1 5/6) + (9 19/36 - 3 11/12) = 7 целых 8/9.
1) 7 7/9 - 5 1/3 = 7 7/9 - 5 3/9 = 2 4/9
2) 2 - 1 5/6 = 1 6/6 - 1 5/6 = 1/6
3) 9 19/36 - 3 11/12 = 9 19/36 - 3 33/36 = 8 55/36 - 3 33/36 = 5 22/36 = 5 11/18
4) 2 4/9 - 1/6 = 2 8/18 - 3/18 = 2 5/18
5) 2 5/18 + 5 11/18 = 7 16/18 = 7 8/9
(5 3/7 - 3 2/5) + (3 - 1 17/35) - (4 - 12/15 - 3 19/105) = 3 целых 11/21.
1) 5 3/7 - 3 2/5 = 5 15/35 - 3 14/35 = 2 1/35
2) 3 - 1 17/35 = 2 35/35 - 1 17/35 = 1 18/35
3) 4 - 12/15 = 3 15/15 - 12/15 = 3 3/15 = 3 1/5
4) 3 1/5 - 3 19/105 = 3 21/105 - 3 19/105 = 2/105
5) 2 1/35 + 1 18/35 = 3 19/35
6) 3 19/35 - 2/105 = 3 57/105 - 2/105 = 3 55/105 = 3 11/21
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(7 7/9 - 5 1/3) - (2 - 1 5/6) + (9 19/36 - 3 11/12) = 7 целых 8/9.
1) 7 7/9 - 5 1/3 = 7 7/9 - 5 3/9 = 2 4/9
2) 2 - 1 5/6 = 1 6/6 - 1 5/6 = 1/6
3) 9 19/36 - 3 11/12 = 9 19/36 - 3 33/36 = 8 55/36 - 3 33/36 = 5 22/36 = 5 11/18
4) 2 4/9 - 1/6 = 2 8/18 - 3/18 = 2 5/18
5) 2 5/18 + 5 11/18 = 7 16/18 = 7 8/9