1.our friends were thought by us all time
2.he will be operated by the doctor in a week
3.the pupil's parents were sent for by the teacher
4.the newspaper was looked for by them everywhere
5.nobody was slept in the bed
6. the telegram was asked for by the neghbor
7. the lecturer was listened to by everybody with great attention
8. the freshman was laughted at by the senior students
9. the headmistress was spoken by the group yesterday
10. their babies were looked after by the young mothers with great care
1.
А) 2целых 1/7×3целых 1/9=2 целых 18/63×3целых 7/63= 6целых 54/63
Б)3/7×7/9=27/63×49/63=1323/63= 21
В)5/8×1целая 13/15×2целых 2/7=
1 действие: 5/8×1целая 13/15= 40/120×1целая 104/120= 1 целая 4160/120= 1целая+ 24 целых 80/120= 25целых 80/120
2 действие: 25 целых 80/120×2целых 2/7= 25целых 1120/1680×2целых 480/1680= 50целых 537600/1680= 50целых+320целых=370целых
2.
1 действие: 27/34×5целых= 3 целых 33/34
2 действие: 2целых 4/5×1/9= 2целых 36/45×5/45= 2целых 180/45= 2целых+4целых=6целых
Пошаговое объяснение:
1 задание: А) Сначала приводим к общему наименьшему знаменателю, потом умножаем. Б) приводим к общему знаменателю, умножаем, неправильную дробь переводим в смешанное число.
