Question

Ученик плетет полоску из бисера уже 45 минут. это 5/7 того времени, которое нужно для ее изготовления. Сколько времени нужно ученику, чтобы закончитть работу?

Answer 1

1) 45:5/7=63 (мин)-всего потребуется
2)63-45=18(мин)-потребуется чтобы закончить работу
Ответ:18 минут

Answer 2

1) 45  :  5 *7  = 63 мин понадобится ученику на всю работу
2) 63-45 =18 мин нужно ученику . чтобы закончить работу
Ответ : 18 мин

Answer 3

Problem Analysis

The student has been working on weaving a bead strip for 45 minutes, which is 5/7 of the total time needed to complete the work. We need to determine how much time the student will need to finish the job.

Solution

Let's assume that the total time needed to complete the work is represented by T.

According to the given information, the student has already spent 45 minutes, which is 5/7 of the total time needed. We can set up the following equation to represent this relationship:

45 minutes = (5/7) * T

To find the value of T, we can rearrange the equation:

T = (45 minutes) / (5/7)

To simplify the calculation, we can multiply the numerator and denominator by the reciprocal of 5/7, which is 7/5:

T = (45 minutes) * (7/5)

Now we can calculate the value of T:

T = 63 minutes

Therefore, the total time needed to complete the work is 63 minutes.

To find out how much more time the student needs to finish the job, we can subtract the time already spent (45 minutes) from the total time needed (63 minutes):

Time needed to finish the job = Total time needed - Time already spent Time needed to finish the job = 63 minutes - 45 minutes Time needed to finish the job = 18 minutes

Therefore, the student will need an additional 18 minutes to finish the job.

Answer

The student will need an additional 18 minutes to finish weaving the bead strip.

Note: The sources provided did not contain specific information related to this problem. The solution was derived using mathematical reasoning based on the given information.