Question

В) 1/2-1/4+2/5 как решить?

Answer 1

1/2-1/4+2/5=10/20-5/20+8/20=13/20

Answer 2

1/2=2/4
2/4-1/4=1/4
1/4=5/20
2/5=8/20
5/20+8/20=13/20

Answer 3

Solving the Equation 1/2 - 1/4 + 2/5

To solve the equation 1/2 - 1/4 + 2/5, we can follow these steps:

1. Find a Common Denominator: To add or subtract fractions, it's helpful to have a common denominator. In this case, the common denominator for 2, 4, and 5 is 20.

2. Convert Fractions to the Common Denominator: We need to express each fraction with the common denominator of 20.

3. Perform the Arithmetic: Once the fractions are expressed with the common denominator, we can perform the addition and subtraction.

Step-by-Step Calculation

1/2 - 1/4 + 2/5 = (10/20) - (5/20) + (8/20) = 10/20 - 5/20 + 8/20 = (10 - 5 + 8)/20 = 13/20

Therefore, the result of the equation 1/2 - 1/4 + 2/5 is 13/20.

This calculation is based on the principles of adding and subtracting fractions with a common denominator.