Question

Туристы отправились в поход одна группа в 7 лодках по три человека в каждой.А вторая в 5 лодках по 4 человека в каждой.Вычисли значения каждого выражения и напиши что оно обозначает.3*7=4*5=3*7+4*53*7-4*5Пожалуйста напишите что оно обозначает

Answer 1

7 лодок  -  по 3 чел

5 лодок  -  по 4 чел.

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3 * 7 = 21 человек - в 7 лодках

4 * 5 = 20 человек - в 5 лодках

3 * 7 + 4 * 5 = 21 + 20 = 41 человек - во всех лодках

3 * 7 - 4 * 5 = 21 - 20 = 1 человек - на столько больше в 7 лодках, чем в 5.

Answer 2

Calculation of Expressions and Their Meanings

To calculate the values of the given expressions and explain their meanings, let's break down each expression step by step:

1. 3 * 7: - This expression represents the multiplication of 3 by 7. - The result of this calculation is 21. - The expression can be read as "3 multiplied by 7" or "3 times 7".

2. 4 * 5: - This expression represents the multiplication of 4 by 5. - The result of this calculation is 20. - The expression can be read as "4 multiplied by 5" or "4 times 5".

3. 3 * 7 + 4 * 5: - This expression represents the addition of the results obtained from multiplying 3 by 7 and 4 by 5. - The calculation can be performed in two steps: - Multiply 3 by 7: 3 * 7 = 21. - Multiply 4 by 5: 4 * 5 = 20. - Add the results: 21 + 20 = 41. - The expression can be read as "3 multiplied by 7 plus 4 multiplied by 5".

4. 3 * 7 - 4 * 5: - This expression represents the subtraction of the result obtained from multiplying 4 by 5 from the result obtained from multiplying 3 by 7. - The calculation can be performed in two steps: - Multiply 3 by 7: 3 * 7 = 21. - Multiply 4 by 5: 4 * 5 = 20. - Subtract the results: 21 - 20 = 1. - The expression can be read as "3 multiplied by 7 minus 4 multiplied by 5".

In summary, the given expressions represent mathematical calculations involving multiplication, addition, and subtraction. The values of the expressions are as follows:

- 3 * 7 = 21 - 4 * 5 = 20 - 3 * 7 + 4 * 5 = 41 - 3 * 7 - 4 * 5 = 1

These calculations can be used to solve various mathematical problems or represent relationships between quantities in different contexts.