(4/7 - 1/3 + 5/6) * 42 = 45
1) 4/7 - 1/3 = 12/21 - 7/21 = 5/21
2) 5/21 + 5/6 = 10/42 + 35/42 = 45/42
3) 45/42 * 42 = 45
Пояснения:
4/7 = (4*3)/(7*3) = 12/21
1/3 = (1*7)/(3*7) = 7/21
5/21 = (5*2)/(21*2) = 10/42
5/6 = (5*7)/(6*7) = 35/42
1) а) 3\16
б) 3 целых три пятых
в) 24
3) ответ: 6 целых 5\36
6/7*3/8:1,5+ 1/5=9/28*10/15+1/5=
=3/14+1/5=15/60+14/60=29/60
4/5*10/6+1 3/5*1/6=4/3+8/5*1/6=
=4/3+4/15=20/15+4/15=24/15=8/3=
=2 2/3
33333:343=96(115 ост)
39909:76=525 (9 ост)