Ответ:1)4/15+4/12=16/60+20/60=36/60=9/15
2) 11/48-5/36=33/144-20/144=13/144
3) 4/5-2/3+4/15=6/15
1.4/5-2/3=12/15-10/15=2/15
2.2/15+4/15=6/15
4) 7/8+11/12-5/6=23/24
1.7/8+11/12=21/24+22/24=43/24
2.43/24-5/6=43/24-20/24=23/24
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Ответ:1)4/15+4/12=16/60+20/60=36/60=9/15
2) 11/48-5/36=33/144-20/144=13/144
3) 4/5-2/3+4/15=6/15
1.4/5-2/3=12/15-10/15=2/15
2.2/15+4/15=6/15
4) 7/8+11/12-5/6=23/24
1.7/8+11/12=21/24+22/24=43/24
2.43/24-5/6=43/24-20/24=23/24