1. 1/4-(1-11/12)=1/4-1+11/12=(1/4+11/12)-1=(3/12+11/12)-1=(14/12-1= 1 2/12-1=1 1/6-1=1/6
2. 2-(12/38-5/22)=2-132/418+95/418=2-37/418=1 381/418
3. 6 3/16-(2 3/8+3 5/12)=6 3/16-2 18/48- 3 20/48=6 9/48-2 18/48-3 20/48=(9-18-20)/48=-29/48
4.8 1/12-3 4/15-1 7/30=8 5/60-3 16/60-1 14/60=4 (5-16-14)60=3 (60+5-16-14)/60=3 35/60=3 7/12
1. 1/4-(1-11/12)=1/4-1+11/12=(1/4+11/12)-1=(3/12+11/12)-1=(14/12-1= 1 2/12-1=1 1/6-1=1/6
2. 2-(12/38-5/22)=2-132/418+95/418=2-37/418=1 381/418
3. 6 3/16-(2 3/8+3 5/12)=6 3/16-2 18/48- 3 20/48=6 9/48-2 18/48-3 20/48=(9-18-20)/48=-29/48
4.8 1/12-3 4/15-1 7/30=8 5/60-3 16/60-1 14/60=4 (5-16-14)60=3 (60+5-16-14)/60=3 35/60=3 7/12