Question

1,8:-2/9= решите пж 0,6 - 3/7= и -3 целых 11/30*6

Answer 1

1,8 / - 2/9 = 18/10 / (- 2/9) = - 81/10 = - 8,1

0,6 - 3/7 = 6/10 - 3/7 = 42/70 - 30/70 = 12/70 = 6/35

- 3 11/30 * 6 = 101/30 * 6 = 101/5 =20 1/5

Answer 2

Sure, let's solve these step by step.

1. $\frac{1}{8} - \frac{2}{9}$:

To subtract these fractions, you need a common denominator. In this case, it would be $8 \times 9 = 72$.

$\frac{1}{8} \times \frac{9}{9} - \frac{2}{9} \times \frac{8}{8}$

This simplifies to:

$\frac{9}{72} - \frac{16}{72}$

Now, subtract the numerators:

$\frac{9 - 16}{72}$

This gives:

$\frac{-7}{72}$

So, $\frac{1}{8} - \frac{2}{9} = \frac{-7}{72}$.

2. $0.6 - \frac{3}{7}$:

To subtract a decimal from a fraction, convert the decimal to a fraction. $0.6 = \frac{6}{10}$.

$\frac{6}{10} - \frac{3}{7}$

Find a common denominator, which is $10 \times 7 = 70$.

$\frac{6 \times 7}{10 \times 7} - \frac{3 \times 10}{7 \times 10}$

This simplifies to:

$\frac{42}{70} - \frac{30}{70}$

Now, subtract the numerators:

$\frac{42 - 30}{70}$

This gives:

$\frac{12}{70}$

Simplify the fraction by dividing both the numerator and denominator by their greatest common factor, which is 2:

$\frac{6}{35}$

So, $0.6 - \frac{3}{7} = \frac{6}{35}$.

3. $-3 \frac{11}{30} \times 6$:

First, convert the mixed number to an improper fraction:

$-3 \frac{11}{30} = -\frac{3 \times 30 + 11}{30} = -\frac{101}{30}$

Now, multiply by 6:

$-\frac{101}{30} \times 6$

Multiply the numerators and denominators:

$-\frac{101 \times 6}{30 \times 1}$

Simplify:

$-\frac{606}{30}$

Reduce the fraction by dividing both the numerator and denominator by their greatest common factor, which is 6:

$-\frac{101}{5}$

So, $-3 \frac{11}{30} \times 6 = -\frac{101}{5}$.