Question

На выполнение домашнего задания по всем предметам у Лены ушло 155 минут 2 пятых этого времени она занимался математикой Сколько времени понадобилось чтобы выполнить домашнее задание по математике

Answer 1

2/5 от 155
Решение:
1) 155:5=31
2) 31*2=62
Ответ: 62 минуты понадобилось на выполнение математики.

Answer 2

Calculation of Time Spent on Homework

To calculate the time it took Lena to complete her homework in mathematics, we need to use the information provided. Lena spent 155 minutes on her homework, and 2/5 of that time was spent on mathematics.

To find the time spent on mathematics, we can multiply the total time spent on homework by the fraction representing the time spent on mathematics:

Time spent on mathematics = (2/5) * 155 minutes

Let's calculate the result:

Time spent on mathematics = (2/5) * 155 minutes = 62 minutes

Therefore, it took Lena 62 minutes to complete her mathematics homework.