Question

-2 2/3 + 2 1/3 • (-15 3/7 -(-4.8):4/15=? помоги пожалуйста ......очень нужно ....

Answer 1

To solve the given expression, let's break it down step by step:

-2 + 2/3 + 2 + 1/3 + (-15 + 3/7 - (-4.8)) ÷ 4/15

First, let's simplify the expression within the parentheses:

-15 + 3/7 - (-4.8) = -15 + 3/7 + 4.8

To add fractions with different denominators, we need to find a common denominator. In this case, the common denominator is 7:

-15 + 3/7 + 4.8 = -15 + (3/7) + (4.8 * 7/7) = -15 + 3/7 + 33.6/7 = -15 + (3 + 33.6)/7 = -15 + 36.6/7

Next, let's simplify the expression involving fractions:

-15 + 36.6/7 = (-15 * 7 + 36.6)/7 = (-105 + 36.6)/7 = -68.4/7

Now, let's divide -68.4/7 by 4/15:

-68.4/7 ÷ 4/15 = (-68.4/7) * (15/4) = (-68.4 * 15)/(7 * 4) = -1026/28

To simplify the fraction, we can divide both the numerator and denominator by their greatest common divisor, which is 2:

-1026/28 = (-1026 ÷ 2)/(28 ÷ 2) = -513/14

Therefore, the value of the expression -2 + 2/3 + 2 + 1/3 + (-15 + 3/7 - (-4.8)) ÷ 4/15 is -513/14.

Please note that the above solution is based on the given expression and the mathematical operations involved.