Question

(-1 3/7*4 2/3+1 7/9)*(-2 1/4) ответ

Answer 1

Ответ:10 1/2

по действям

1) -1 3/7*4 2/3=-10/7*14/3=-20/3=-6 2/3

2) -6 2/3+1 7/9=-6 6/9+1 7/9=--5 15/9+1 7/9=-4 8/9

3) -4 8/9*(-2 1/4)=-42/9*(-9/4)=10 1/2

Пошаговое объяснение:

Answer 2

To calculate the given expression, follow the order of operations (PEMDAS/BODMAS):

1. First, perform the multiplication and division from left to right: -1 * 3/7 = -3/7 4 * 2/3 = 8/3 1 * 7/9 = 7/9

2. Now, add the results: -3/7 + 8/3 + 7/9

To add fractions, we need to find a common denominator. The common denominator of 7, 3, and 9 is 63.

3. Convert each fraction to have a denominator of 63: -3/7 = -3/7 * 9/9 = -27/63 8/3 = 8/3 * 21/21 = 168/63 7/9 = 7/9 * 7/7 = 49/63

4. Now, add the fractions: -27/63 + 168/63 + 49/63 = ( -27 + 168 + 49 ) / 63 = 190 / 63

5. Finally, multiply by -2 1/4: -2 1/4 = -2 - 1/4 = -9/4

6. Multiply the result: -9/4 * 190/63 = (-9 * 190) / (4 * 63) = -1710 / 252

To simplify the result: -1710 = -2 * 3 * 5 * 57 252 = 2^2 * 3^2 * 7

We can cancel common factors: -1710 / 252 = -(2 * 3 * 5 * 57) / (2^2 * 3^2 * 7) = - (5 * 57) / (2 * 3 * 7) = -285/42

The final answer is -285/42.