Question

Реши задачу разными способами. Какой способ удобнее? Почему? Фотограф каждую неделю делает школу. В каждый выезд он фотографирует 30 детей. Сколько детей он сфотографирует за 4 недели?​

Answer 1

Ответ:

Пошаговое объяснение:

1-й способ:

30+30+30+30=120

2-й способ:

30*4=120

Какой способ вам удобнее, выберите сами

Answer 2

30×4=120

120-30=90 (детей фотографирует за 4 неделю)

вот ответ.

Answer 3

Problem Analysis

The photographer takes pictures of 30 children on each outing and wants to know how many children he will photograph in 4 weeks. To solve this problem, we can use multiplication to find the total number of children photographed.

Solution 1: Multiplication

We can multiply the number of children photographed per outing (30) by the number of outings in 4 weeks (4) to find the total number of children photographed.

Solution: The photographer will photograph 30 children per outing * 4 outings in 4 weeks = 120 children in 4 weeks.

Solution 2: Addition

Alternatively, we can add the number of children photographed on each outing for 4 weeks to find the total number of children photographed.

Solution: The photographer will photograph 30 children per outing + 30 children per outing + 30 children per outing + 30 children per outing = 120 children in 4 weeks.

Conclusion

Both methods yield the same result, which is that the photographer will photograph 120 children in 4 weeks. However, the multiplication method is more convenient and efficient because it involves a single calculation, whereas the addition method requires multiple additions. Therefore, the multiplication method is the preferred and more convenient approach.

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