Question

A) 3/7+1/4 б) 2/3-3/5 в) -0.5*1/3/15 г) -2.5*(-1/1/7)=?Мне срочна надо пожалуйста решите .

Answer 1

А) 19/28
Б) 1/15
В) 9/15
Г) 100/35=2 6/7

Answer 2

Solution:

A) To add 3/7 and 1/4, we need to find a common denominator, which is 28. Then, we can add the fractions: 3/7 = 12/28 1/4 = 7/28 So, 3/7 + 1/4 = 12/28 + 7/28 = 19/28.

B) To subtract 3/5 from 2/3, we need to find a common denominator, which is 15. Then, we can subtract the fractions: 2/3 = 10/15 3/5 = 9/15 So, 2/3 - 3/5 = 10/15 - 9/15 = 1/15.

C) To calculate -0.5 * 1/3 / 15, we can perform the following steps: -0.5 * 1/3 = -0.5/3 Then, we can divide -0.5/3 by 15: -0.5/3 / 15 = -0.5/45.

D) To calculate -2.5 * (-1/1/7), we need to simplify the expression: -1/1/7 = -1/(1/7) = -1 * 7 = -7 Then, we can multiply -2.5 by -7: -2.5 * (-7) = 17.5.

Therefore: A) 3/7 + 1/4 = 19/28 B) 2/3 - 3/5 = 1/15 C) -0.5 * 1/3 / 15 = -0.5/45 D) -2.5 * (-1/1/7) = 17.5.