Question

Реши разными способами Чему равна площадь прямоугольника длина которого равна 7см а ширина 3 см Какое свойства умножения ты применил

Answer 1

7*3=21(см2)-площадь прямоугольника

Answer 2

Calculation of the Rectangle's Area

To find the area of a rectangle, you multiply its length by its width. In this case, the length of the rectangle is 7 cm and the width is 3 cm. Therefore, the formula to calculate the area is:

Area = Length × Width

Substituting the given values, we have:

Area = 7 cm × 3 cm

To calculate the area, we multiply 7 cm by 3 cm:

Area = 21 cm²

So, the area of the rectangle is 21 square centimeters.

Property of Multiplication Used

In this calculation, the property of multiplication used is the commutative property. The commutative property states that the order of the factors does not affect the product. In other words, when multiplying two numbers, you can change the order of the numbers without changing the result.

For example, in the calculation of the area of the rectangle, we multiplied the length (7 cm) by the width (3 cm). However, we could have also multiplied the width by the length and obtained the same result:

Area = Width × Length

Using the commutative property, we can rearrange the multiplication:

Area = 3 cm × 7 cm

This gives us the same result of 21 cm².

So, the commutative property of multiplication allows us to change the order of the factors without affecting the product.