Question

3/5 + 4/7 : 5/21 пжжжж​

Answer 1

При делении второе число переворачивается

Answer 2

To solve this expression, you can follow these steps:

Step 1: Add the fractions on the left side of the colon (":") together. 3/5 + 4/7

To add fractions, you need a common denominator. In this case, the least common denominator (LCD) is 35, which both 5 and 7 can divide into evenly. So, you'll rewrite both fractions with a denominator of 35:

(3/5) * (7/7) = 21/35 (4/7) * (5/5) = 20/35

Now, the fractions have the same denominator, and you can add them:

21/35 + 20/35 = 41/35

Step 2: Divide the result from Step 1 by the fraction on the right side of the colon (":"). 41/35 ÷ 5/21

To divide fractions, you can multiply the first fraction by the reciprocal of the second fraction:

(41/35) * (21/5)

Now, multiply the numerators and denominators:

(41 * 21) / (35 * 5) = 861 / 175

So, the final result is 861/175.