Question

-13*(2/7)-9*(-3/4)+27*(2/7)-3*(-3/4)-1

Answer 1

Ответ:

12

Пошаговое объяснение:

1) -13 * 2/7 = -26/7 = -3. 5/7

2) 9 * (-3/4) = -27/4 = -6. 3/4

3) 27 * 2/7 = 54/7 = 7. 5/7

4) 3 * (-3/4) = -9/4 = -2. 1/4

5) -3. 5/7 - (-6. 3/4) + 7. 5/7 - (-2. 1/4) - 1 =

-3.5/7 + 6. 3/4 + 7. 5/7 +

2. 1/4 - 1 =

-3. 20/28 + 6. 21/28 + 7. 20/28 + 2. 7/28 - 1 =

3. 1/28 + 7. 20/28 + 2. 7/28 - 1 =

10. 21/28 + 2. 7/28 - 1 =

12. 28/28 - 1 = 13 - 1 = 12

Ответ: 12

Answer 2

To simplify the expression:

-13 * (2/7) - 9 * (-3/4) + 27 * (2/7) - 3 * (-3/4) - 1

First, let's simplify the multiplications and divisions within parentheses:

= (-26/7) + (27/4) + (54/7) + (9/4) - 1

Now, let's find a common denominator, which in this case is 28:

= (-4 * (-26) + 7 * (27) + 4 * (54) + 7 * (9) - 28) / 28

= (104 + 189 + 216 + 63 - 28) / 28

Now, add and subtract the values:

= (104 + 189 + 216 + 63 - 28) / 28

= (544) / 28

Now, simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 4:

= (544/4) / (28/4)

= 136/7

So, the simplified value of the expression is 136/7.