Question

папа привёз 7 одинаковых пакетов с картофелем, по 4 кг в каждом. За неделю мама использовала 2 пакета с картофелем. Сколько кг картофеля у нее осталось? Решить задачу составляя выражение.

Answer 1

[7-2]*4=20[кг]-картофеля у нее осталось

Answer 2

Problem Analysis

To solve this problem, we need to determine the amount of potatoes that the mother has left after using 2 bags. We know that the father brought 7 identical bags of potatoes, each weighing 4 kg. The mother used 2 bags. We need to calculate the remaining weight of potatoes.

Solution

To solve this problem, we can use the following expression:

Total weight of potatoes - Weight of potatoes used

Let's calculate the solution step by step.

1. Calculate the total weight of potatoes: - The father brought 7 bags, each weighing 4 kg. - So, the total weight of potatoes is 7 bags * 4 kg/bag = 28 kg. (source:

2. Calculate the weight of potatoes used: - The mother used 2 bags of potatoes. - Each bag weighs 4 kg. - So, the weight of potatoes used is 2 bags * 4 kg/bag = 8 kg.

3. Calculate the remaining weight of potatoes: - Subtract the weight of potatoes used from the total weight of potatoes. - Remaining weight = Total weight of potatoes - Weight of potatoes used. - Remaining weight = 28 kg - 8 kg = 20 kg.

Answer

The mother has 20 kg of potatoes left.