Question

А) (2/5+3/5)-2/3= В) 3/4+7/8=

Answer 1

(2/5+3/5)-2/3=1/3
1) 2/5+3/5=5/5(1)
2) 1/1-2/3=1/3

3/4+7/8=13/8=1 5/8

Answer 2

$1)( \frac{2}{5} + \frac{3}{5} ) - \frac{2}{3} = \frac{1}{3} \\1) \frac{2}{5} + \frac{3}{5} = \frac{5}{5} = 1 \\ 2)1 - \frac{2}{3} = \frac{1}{3}$
[tex]2) \frac{3}{4} + \frac{7}{8} = \frac{13}{8}

Answer 3

Let's solve each expression step by step:

А) (2/5 + 3/5) - 2/3

Step 1: Add the fractions inside the parentheses. (2/5 + 3/5) = 5/5 = 1 (since the denominators are the same, we can simply add the numerators)

Step 2: Subtract 2/3 from the result of the previous step. 1 - 2/3

To subtract fractions, they must have the same denominator. The least common denominator (LCD) for 1 and 2/3 is 3. So, we need to rewrite 1 as a fraction with a denominator of 3:

1 = 3/3

Now, we can subtract:

(3/3) - (2/3) = 1/3

So, А) (2/5 + 3/5) - 2/3 = 1/3

B) 3/4 + 7/8

Step 1: Find the LCD, which is 8 (the smallest common multiple of 4 and 8).

Step 2: Convert both fractions to have a denominator of 8:

(3/4) * (2/2) = 6/8 (7/8)

Now, we can add the fractions:

6/8 + 7/8 = 13/8

However, it's important to simplify the fraction:

13/8 = 1 and 5/8

So, B) 3/4 + 7/8 = 1 5/8