Question

На какое число нужно разделить дробь 10/21 чтобы получилось б) 2/3 Г)5/21 помогите срочно надо

Answer 1

1) 10/21 : х = 2/3
х = 10/21 : 2/3
х = 10/21 × 3/2
х = 5/7
Ответ: 5/7
г) 10/21 : х = 5/21
х = 10/21 : 5/21
х = 10/21 × 21/5
х = 2
Ответ: 2

Answer 2

Solution for Dividing 10/21 to Get 2/3 and 5/21

To find the number by which we need to divide the fraction 10/21 to get 2/3 and 5/21, we can use the following approach:

1. Dividing 10/21 to Get 2/3: - To find the number by which we need to divide 10/21 to get 2/3, we can set up the equation: 10/21 ÷ x = 2/3. - Solving for x will give us the number by which we need to divide 10/21 to get 2/3.

2. Dividing 10/21 to Get 5/21: - Similarly, to find the number by which we need to divide 10/21 to get 5/21, we can set up the equation: 10/21 ÷ y = 5/21. - Solving for y will give us the number by which we need to divide 10/21 to get 5/21.

Let's solve these equations step by step.

Dividing 10/21 to Get 2/3:

The equation to solve is: 10/21 ÷ x = 2/3.

To solve for x, we can use the following steps: 1. Cross-multiply to get rid of the fraction: 10 * 3 = 21 * 2. 2. Solve for x.

Dividing 10/21 to Get 5/21:

The equation to solve is: 10/21 ÷ y = 5/21.

To solve for y, we can use the following steps: 1. Cross-multiply to get rid of the fraction: 10 * 21 = 21 * 5. 2. Solve for y.

Let's calculate the values of x and y.

Calculation:

1. Dividing 10/21 to Get 2/3: - Cross-multiplying: 10 * 3 = 21 * 2. - Solving for x: x = (10 * 3) / (21 * 2) = 30 / 42 = 5/7.

2. Dividing 10/21 to Get 5/21: - Cross-multiplying: 10 * 21 = 21 * 5. - Solving for y: y = (10 * 21) / (21 * 5) = 210 / 105 = 2.

Conclusion:

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