Предмет: Математика, автор: bul4uk

У.цьому.році.кількість.учасників.хорового.гуртка.збільшилась.на.20%.порівнчяно.з.минулим.роком..Скільки.учасників.хорового.гуртка.якщо.у..попередньому.їх.було.30?

Ответы

Автор ответа: таня90
0

30уч-100%

?уч  - 20%

30*0,2=6(уч)-  на 6 учнів збільшилась кількість учасників гуртка 

30+6=36(уч)-кількість учасників гуртка

    

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          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