Question

2/3(1,5+0,6)-0,8(5/12-0,5)=1​

Answer 1

$\frac{2}{3} (1.5 + 0.6) - 0.8( \frac{5}{12} - 0.5) = 1$

$\frac{2}{3} \times \frac{21}{10} - 0.8( \frac{5}{12} - \frac{5}{10} ) = 1$

$\frac{42}{30} + \frac{1}{15} - = 1$

$\frac{44}{30} - 1 = 0$

$\frac{14}{30} = 0$

Это ложь.

Может там не "=1" ?

Answer 2

Let's solve the expression step by step:

1. First, perform the operations within the parentheses: 1,5 + 0,6 = 2,1

2. Next, compute the fractions: 2/3 * 2,1 = (2 * 2,1) / 3 = 4,2 / 3 = 1,4

   5/12 - 0,5 = 5/12 - 6/12 = (5 - 6) / 12 = -1/12

3. Now, multiply the values outside the parentheses: 0,8 * (-1/12) = -0,8/12

4. Finally, subtract the results: 1,4 - (-0,8/12)

To combine the fractions with the decimal, you need to convert the decimal to a fraction. The decimal -0,8 is equivalent to -8/10 or -4/5. So:

1,4 - (-4/5) = 1,4 + 4/5

Now, find a common denominator to add the fractions:

(1 * 5 + 4) / 5 = 9/5

So, the final result of the expression is:

1,4 + 9/5 = 1,4 + 1,8 = 3.2

Therefore, the expression 2/3(1,5+0,6) - 0,8(5/12-0,5) is equal to 3.2.