Question

1. 1/4 - (1 - 11/12)=
2. 2 - (12/38 - 5/22)=
3. 6 3/16 - (2 3/8 + 3 5/12)=
4. 8 1/12 - 3 4/15 - 1 7/30=
Хотя бы два, помогите пажее
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Answer 1

Ответ:

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