Предмет: Математика, автор: dasha240107

Из полной бочки воды отлили сначала 35% воды, после чего осталось 104 литра воды. Сколько литров воды было первоначально? Ответ 160, нужно решение

Ответы

Автор ответа: daniel0041
1
Очень легко. Соблюдая пропорцию, решаем задачу.

100%-35%=65%

104:65%= 1,6 литров содержится в одном проценте.
Далле находим сколько содержится в 100%

100%×1,6=160

daniel0041: Спасибо
Автор ответа: Galina1013
2

Ответ:

160л

Пошаговое объяснение:

100-35=65%    -    осталось воды

составим пропорцию

104 л     -    65%

x  л        -     100%

104*100/65=160л       -   было воды первоначально

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Упражнение 1. Раскройте скобки, употребляя глаголы в форме Present Simple или Present Continuous.
1. He (to work) in the city centre.
2. I (to write) an essay now.
3. You (to go) to school on Sundays?
4. We (not to dance) every day.
5. They (to play) in the hall now?
6. Where he (to live)? – He (to live) in a village.
7. He (to sleep) now?
8. They (to read) many books.
9. The children (to eat) cakes now.
10. He (to help) his mother every day.
11. You (to play) the piano well?
12. Look! Michael (to dance) now.
Упражнение 2. Раскройте скобки, употребляя глаголы в форме Present Simple или Present Continuous.

1. Her father (not to watch) TV at the moment. He (to sleep) because he (to be) tired.
2. Where your uncle (to work)? – He (to work) at school.
3. Your friend (to do) his homework now?
4. When you usually (to come) home from school? – I (to come) at four o’clock.
5. My sister (not to play) the piano now. She (to play) the piano in the evening.
6. You (to read) a magazine and (to think) about your holiday at the moment?
7. I (to sit) in the waiting room at the dentist’s now.
8. When you (to listen) to the news on the radio?
9. You (to play) chess now?
10. My father (not to work) at the shop.
11. Look at the sky: the clouds (to move) slowly, the sun (to appear) from behind the clouds, it (to get) warmer.
12. I (not to drink) coffee in the evening. I (to drink) coffee in the morning.
13. What your friend (to do) now? – She (to wash) the dishes.
14. Your grandfather (to work) at this factory?