Предмет: Математика, автор: trtro39

2. Решите задачи.
а) Сравните 30 % от 20 и 20 % от 30.
б) Найдите число, 40 % которого равны 46.
в) Из 200 картин, представленных на вернисаже, были куплены 160. Сколько
процентов от представленных на вернисаже картин составило количество
оставшихся?

Ответы

Автор ответа: lara164
0
а) 20:100*30%=6- это 30%от 20
30:100*20% = 6 - это 20% от 30
6=6.
б) 46 : (40:100) = 46:0,4 =115- искомое число
в) (200-160):200 = 0,2 - такая часть картин осталась
0,2 *100% = 20% - от всех картин составляют оставшиеся
Похожие вопросы
Предмет: Русский язык, автор: 82678256phaha
Предмет: Английский язык, автор: akaiakkerman1
Это срочно, пожалуйста помогите выполнить задание. Вставьте глаголы в Present Simple или Present Continuous

1. a) It is seven o'clock. I ... , ... my bed, ... and ... to the kitchen to have my breakfast. to get up, to make, to wash, to go
b) It is seven o'clock. I ... . Nelly ... her bed. Father ... . Mother ... to the kitchen to cook breakfast . to get up, to make, to wash, to go
2. a) It is eleven o'clock. I ... , ... a book, and ... to read. to stand up, to take, to begin
b) It is eleven o'clock. I ... , the teacher ... to me, Mary ... to write on the blackboard. to read, to listen, to begin
3. a) It is evening. I ... into the room, ... TV, ... in a low easy chair and ... watching the program. to walk, to switch on, to sit down, to begin
b) It is evening now. I ... into the room. Father ... TV, Mother ... , Grandma ... in an easy chair. to walk, to watch, to sew, to sleep
4. a) It is a hot afternoon. Bob ... to the bank of the river, ..: his things, ... into the water and ... his dog. to come, to take off, to jump, to call
b) It is a hot afternoon. Betty ... to the bank of the river. Some girls ... their things, others ... into the water. Bob, who is already in the water, ... his dog. to come, to take off, to jump, to call
5. a) It is five o'clock. Mother ... a yellow cloth on the table, ... out the blue cups, ... the cake, and ... out hot tea. to put, to get, to cut, to pour
b) It is five o'clock. Mother ... a yellow cloth on the table. Nick -... out the blue cups, Father ... the cake, Nelly ... out hot tea. to put, to get, to cut, to pour
6. a) At six o'clock I ... my dog in the park. to walk
b) It is six o'clock now. I ... my dog in the park. to walk
Предмет: Литература, автор: nastiabananas1234