Question

Детскую библиотеку за 4 дня посетили 423 человека. В первый день её посетили 43 человека. Во второй день-в 2 раза больше, чем в первый, но на 117 человек меньше, чем в третий день. Сколько человек посетили библиотеку в четвёртый день?

Answer 1

1)43*2=86(ч)-во второй день.
2)86+117=203(ч)-в третий день.
3)423-(43+86+203)=91(ч)-в четвертый день
Ответ:91 человек посетил библиотеку в четвертый день.

Answer 2

1) 43•2=86(человек)-посетили во 2 день
2)117+86=203(человек)-посетили в 3 день
3)423-(43+86+203)=91(человек)-посетили в 4 день
Ответ:в 4 день посетили 91 человек.

Answer 3

Problem Analysis

We are given information about the number of people who visited a children's library over the course of four days. On the first day, 43 people visited the library. On the second day, the number of visitors was twice as many as the first day, but 117 fewer than the third day. We need to determine how many people visited the library on the fourth day.

Solution

Let's break down the information given:

- First day: 43 visitors - Second day: Twice as many as the first day, but 117 fewer than the third day - Fourth day: Unknown number of visitors

To find the number of visitors on the fourth day, we need to determine the number of visitors on the third day.

Let's calculate the number of visitors on the third day:

- Second day: Twice as many as the first day - Second day visitors = 2 * 43 = 86 - Second day: 117 fewer than the third day - Third day visitors = Second day visitors + 117 = 86 + 117 = 203

Now that we know the number of visitors on the third day, we can calculate the number of visitors on the fourth day:

- Total visitors over four days: 423 - First day visitors: 43 - Second day visitors: 86 - Third day visitors: 203 - Fourth day visitors = Total visitors - (First day visitors + Second day visitors + Third day visitors) - Fourth day visitors = 423 - (43 + 86 + 203) = 423 - 332 = 91

Therefore, 91 people visited the library on the fourth day.

Answer

The number of people who visited the children's library on the fourth day is 91.