Question

2-3 1/7•(2-1 9/11):8/21=?

Answer 1

ответ равен 1/2

Пошаговое объяснение:

2-22/7×(2-20/11)÷8/21=

=2-27/7×2/11×21/8=

=2-2×3/4=

=2-3/2=

=1/2

Answer 2

Ответ:

2-3 1/7•(2-1 9/11):8/21 =

$2 - \frac{22}{7} * ( 2 - \frac{20}{11} ) * \frac{21}{8} \\2 - 22 * \frac{2}{11} * \frac{3}{8} = 2 - 2 * \frac{3}{4} = 2 - \frac{3}{2} \\= \frac{1}{2}$

Answer 3

Let's break down the expression step by step:

1. First, simplify the expressions inside the parentheses:

   • 2 - 1 9/11 = 1 2/11 (convert the mixed number to an improper fraction)

2. Now, we have the expression as follows: 2-3 1/7 • (1 2/11) : 8/21

3. Next, perform the multiplication and division from left to right:

   • 2 - 3 1/7 • 1 2/11 = 2 - 3 1/7 • 13/11
   • 2 - 3 1/7 • 13/11 = 2 - (22/7) • (13/11)

4. Now, multiply the fractions:

   • (22/7) • (13/11) = (22 * 13) / (7 * 11) = 286/77

5. Replace the multiplication in the expression: 2 - 286/77 : 8/21

6. To divide fractions, invert the divisor and multiply: 286/77 ÷ (8/21) = 286/77 * (21/8)

7. Simplify the multiplication: (286 * 21) / (77 * 8) = 6006/616

8. Finally, simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 22: (6006 ÷ 22) / (616 ÷ 22) = 273/28

So, the simplified result of the expression is 273/28.