Question

4 2/5 - ( 3 - 3/10 ) *3 *1/81 =

Answer 1

4 2/5 - ( 3 - 3/10 ) *3 *1/81 =4 2/5 - ( 27/10 ) *1/27 =4 4/10 - 1/10=4 3/10

Удачи!

Answer 2

To solve this expression, let's break it down step by step:

1. First, simplify the innermost parentheses:

   $3 - \frac{3}{10} = \frac{30}{10} - \frac{3}{10} = \frac{27}{10}$.

2. Multiply the result by 3:

   $3 \times \frac{27}{10} = \frac{81}{10}$.

3. Multiply the above result by $\frac{1}{81}$:

   $\frac{81}{10} \times \frac{1}{81} = \frac{1}{10}$.

4. Now, subtract this value from $4 \frac{2}{5}$:

   $4 \frac{2}{5} - \frac{1}{10}$.

To subtract fractions, they need a common denominator. The common denominator for 5 and 10 is 10. Rewrite $\frac{2}{5}$ with a denominator of 10:

$4 \times \frac{10}{10} + \frac{2}{5} \times \frac{2}{2} - \frac{1}{10}$.

$= \frac{40}{10} + \frac{4}{10} - \frac{1}{10}$.

$= \frac{43}{10} - \frac{1}{10}$.

$= \frac{42}{10}$.

$= 4.2$.

So, the simplified expression is $4.2$.