Предмет: Математика, автор: kachanovayana2312

За перший день Василько прочитав 30% усієї книжки, за другий - 68 % остачі, а за третій решту - 112 сторінок. Скільки сторінок у книжці ?

Ответы

Автор ответа: XxCrazyDenYTxX
0

Ответ:

Объяснение:

Прочитано за 1 день - 30%

Прочитано за 2 день - 68%

100% - уся книжка

1) 30+68=98 (%)- прочитав Ваилько за 2 дні

2) 100-98=2 (%)- прочитав Ваилько за 3 день

3) 112:2=56 (ст.)- 1% книжки

4) 56*100=5600 (ст.)- у книжці

ВІдповідь: 5600 сторінок


XxCrazyDenYTxX: Надеюсь помог
Автор ответа: evasaiii105
0

Відповідь:500

Покрокове поясненя:

100-30=70-(василько прочитав за другий і за третій дні)

70:100=0.7-(1процент від залишку)

0.7•68=47,6-(прочитано за 2 день )

100%-30%-47.6%= 22,4-(прочитано за 3день)

112:22,4=5сторінки(становлять 1%від книги)

5•100=500сторінок у книзі

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