Question

1 + 1 - - 5 2 дроби срочно надо!!!

Answer 1

$\frac{1}{2}+ \frac{1}{5}= \frac{5+2}{10}= \frac{7}{10}=0,7$

Answer 2

Fractions: Adding and Subtracting

To add or subtract fractions, you need to have a common denominator. The common denominator is the same number that both fractions can be expressed in terms of. Once you have a common denominator, you can add or subtract the numerators while keeping the denominator the same.

Here are some examples:

1. Adding Fractions: - Example 1: 1/2 + 1/5 - To add these fractions, we need to find a common denominator. In this case, the least common multiple of 2 and 5 is 10. - So, we can rewrite the fractions with a common denominator: - 1/2 = 5/10 (multiply the numerator and denominator by 5) - 1/5 = 2/10 (multiply the numerator and denominator by 2) - Now, we can add the fractions: - 5/10 + 2/10 = 7/10 - Therefore, 1/2 + 1/5 = 7/10.

- Example 2: 4/9 + 3/9 - In this case, the fractions already have a common denominator, which is 9. - We can simply add the numerators: - 4/9 + 3/9 = 7/9.

2. Subtracting Fractions: - Example 1: 3/4 - 1/4 - Since the fractions have the same denominator, we can subtract the numerators directly: - 3/4 - 1/4 = 2/4 - However, we can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 2: - 2/4 = 1/2.

- Example 2: 5/6 - 2/6 - Again, since the fractions have the same denominator, we can subtract the numerators directly: - 5/6 - 2/6 = 3/6 - Simplifying the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 3: - 3/6 = 1/2.

These are just a few examples of adding and subtracting fractions. Remember to always find a common denominator before performing the operation.