Замените умножение ритмическим счётом.
2.
2x3 = 6
3, 6
5•9= ,4•8= ,4•7= ,5•1= ,5•8= ,4•4= ,5•3= ,5•5= ,4•1= ,5•7= ,4•3= .​

Пошаговое объяснение:

"Лекарство нужно пить 3 раза по 0,5 гр в день в течение 7 дней".

Для начала найдем, сколько должен больной принимать лекарство больной в день:

1) 0,5 гр * 3 = 1,5 гр - в день.

То есть, больной должен принимать 1,5 грамма лекарства в течение семи дней. Узнаем, сколько граммов лекарства будет использовано за неделю лечения:

2) 1,5 гр * 7 = 10,5 граммов.

В условии задачи сказано, что в одной упаковке 10 таблеток, и каждая таблетка весит по 0,25 грамма.

Находим общий вес таблеток:

3) 0,25 гр * 10 = 2,5 гр - общий вес таблеток в упаковке (при умножении дес.дроби на 10 запятая вправо на один знак).

Ну а теперь можем найти количество упаковок, разделив 10,5 грамм на 2,5

4) 10,5 : 2,5 = 105 : 25 = 4,2 ≈ 4 ≈ 5 (вспомни правила деления дес.дробей)

А вообще, тут ответы могут быть разные: кто-то 4,2 округлит до 5, а кто-то до 4. Тут уже думай сам.

Задача решена.

My summer holidays (Мои летние каникулы)

After my hard and busy school year my summer holidays began. I felt happy and began to plan a lot of wonderful things to do during my summer vacation.  

I was dreaming about far South countries I always wanted to visit but I had to go to the Azove seaside with my relatives. The water was very warm there because you know Azove Sea isn’t deep. What I liked there - a lot of different kinds of entertainment there: "water mountains", water scooters and discos.

There was nothing to do all day except lying in the sun and getting a wonderful tan. I was playing with my little sister on the sand and in the waves teaching her to swim. Later I returned to Kherson and spent some time in town going out with my friends, reading, listening to music, watching TV, playing computer games. After that I went to the sports camp where I spent seven days.

It was very useful experience because I had to get up very early, to train a lot, and to rest very little. But it made me stronger and healthier.

I was very happy to return home and I spent several days in my summer cottage, I helped my grandpa to dig the garden, to water plants, and to gather fruit and vegetables. I was fishing with my grandpa and we were cooking fish together. Only insects were spoiling my good mood. I enjoyed floating by boat, swimming in the river and helping my grandparents.

During my summer holidays I made many new friends, read a lot of interesting books, got to know a lot of useful things. Now I feel ready to get back to school.

I am happy to meet my friends and teachers.

Чуть чуть можешь переделать)