Question

3 9/14:(1 3/7-5/21*0,9)-0,76

Answer 1

3 9/14 : (1 3/7 - 5/21 * 0,9) - 0,76 = 2,24,

1) 5/21 * 0,9 = 5/21 * 9/10 = 3/14,
2) 1 3/7 - 3/14 = 10/7 - 3/14 = 20/14 - 3/14 = 17/14 = 1 3/14,
3) 3 9/14 : 1 3/14 = 51/14 : 17/14 = 51/14 * 14/17 = 3,
4) 3 - 0,76 = 2, 24

Answer 2

Let me break that down for you. It looks like a mathematical expression:

$3 \frac{9}{14} - \left(1 \frac{3}{7} - \frac{5}{21} \times 0.9\right) - 0.76$

First, let's simplify the parts separately:

$3 \frac{9}{14} = \frac{57}{14}$

$1 \frac{3}{7} = \frac{10}{7}$

Now, substitute these back into the original expression:

$\frac{57}{14} - \left(\frac{10}{7} - \frac{5}{21} \times 0.9\right) - 0.76$

Now, calculate the multiplication:

$\frac{57}{14} - \left(\frac{10}{7} - \frac{45}{21}\right) - 0.76$

Continue simplifying:

$\frac{57}{14} - \left(\frac{10}{7} - \frac{15}{7}\right) - 0.76$

Combine the fractions inside the parentheses:

$\frac{57}{14} - \frac{-5}{7} - 0.76$

Now, find a common denominator for the fractions:

$\frac{57}{14} + \frac{5}{7} - \frac{76}{100}$

Convert $\frac{57}{14}$ to have a denominator of 100:

$\frac{407.142857}{100} + \frac{5}{7} - \frac{76}{100}$

Now, add the fractions:

$4.07142857 + \frac{5}{7} - 0.76$

Combine the decimal and the fraction:

$3.31142857 - 0.76$

Finally, subtract:

$2.55142857$

So, the result is approximately $2.55$.