В наборе были гирьки с массами 16, 17 и 18 граммов, поровну каждого вида. После того как несколько гирек потерялось, все оставшиеся гирьки взвесили, их масса оказалась равной 1000 граммов. Какое наименьшее количество гирек могло быть потеряно?
Прочитайте приведённые ниже предложения. Выберите и запишите
правильное слово. 1.Have you ever been to Australia? - Yes, I
(have/ had). We (sailed/ have sailed) there last September. 2. Have you written Exercise 4? - Yes. We (have done/ did) it at home yesterday.
3. I have explained the rule to Greg. I (have spoken/ spoke) to him after classes.
4. Mary (has received/ received) this task two days ago. I don't know if she (has already done/
already did) it. 5. (Have you rung/ Did you ring) the office manager yet? - Yes. I (have informed/
informed) her of your visit next week. 6. I (have done/ did) everything. Now I (am/ was) free and (can/ could) home. - Are you sure you (have done/ did) everything? 7.We first (saw/ have seen) this film five years
ago. 8. Has he handed in the project? - Yes, he has.
He (did/ has done) it last week.
9. Mother (gave/ has given) me some money. I can buy a new dictionary. 10. Helen (never swam/ has never swum) in the ocean
Прочитайте приведённые ниже предложения. Выберите и запишите
правильное слово. 1.Have you ever been to Australia? - Yes, I
(have/ had). We (sailed/ have sailed) there last September. 2. Have you written Exercise 4? - Yes. We (have done/ did) it at home yesterday.
3. I have explained the rule to Greg. I (have spoken/ spoke) to him after classes.
4. Mary (has received/ received) this task two days ago. I don't know if she (has already done/
already did) it. 5. (Have you rung/ Did you ring) the office manager yet? - Yes. I (have informed/
informed) her of your visit next week. 6. I (have done/ did) everything. Now I (am/ was) free and (can/ could) home. - Are you sure you (have done/ did) everything? 7.We first (saw/ have seen) this film five years
ago. 8. Has he handed in the project? - Yes, he has.
He (did/ has done) it last week.
9. Mother (gave/ has given) me some money. I can buy a new dictionary. 10. Helen (never swam/ has never swum) in the ocean
21 конфета
Объяснение4 день 3 день
2 день 1
День
2
12
21
вечер
утро
4
8
14
4
дня.
4 день
вечером 4го дня осталось 2 конфеты.
значит утром должно было быть 4 конфеты, т.к. утром надо съесть 2 конфеты. занесем это в таблицу.
3 день
Эти четыре конфеты утра 4го дня - это 2/3 от того, что было вечером зго дня. (потому, что 1/3 она съела). значит вечером Зго дня было
4:(2/3) = 6. а утром значит было (6+2) =8 конфет. -- занесем в таблицу.
2 день
аналогично Зму дню:
вечер
8:(2/3)= 12
утро
12+2 = 14
вечер
1 день
14:(2/3) = 21
Значит днем 1го дня была 21 конфета столько подарила бабушка Ане.