1) 15-7 3/5=15-7,6=7,4=7 2/5=37/5;
2) 37/5+2 7/8=37/5+23/8=(37*8+23*5)/40=411/40=10 11/40
ответ: 10 11/40.
1) 15-7 3/5=15-7,6=7,4=7 2/5=37/5;
2) 37/5+2 7/8=37/5+23/8=(37*8+23*5)/40=411/40=10 11/40
ответ: 10 11/40.