Question

РЕШИТЕ!!! (-2 5/18 - 5 1/12 + 1 2/9)* ( 0,81 : 0,4)

Answer 1

$(-2 \frac{5}{18} - 5\frac{1}{12} + 1\frac{2}{9})* ( 0,81 : 0,4)=-12\frac{69}{160} \\\\ 1)-2\frac{5}{18}^{(2}- 5\frac{1}{12}^{(3} =-2\frac{10}{36}-5\frac{3}{36}=-7\frac{13}{36}\\ \\ 2) -7\frac{13}{36}+{1\frac{2}{9}}^{(4}=-7\frac{13}{36}+1\frac{8}{36}=-6\frac{5}{36}\\ \\ 3) 0,81:0,4=8,1:4=8\frac{1}{10}\cdot\frac{1}{4}=\frac{81}{10}\cdot{\frac{1}{4}}=\frac{81}{40}=2\frac{1}{40} \\ \\ 4) -6\frac{5}{36}\cdot2\frac{1}{40}=-\frac{221}{36} \cdot\frac{81}{40}=-\frac{1989}{160}=-12\frac{69}{160}$

Answer 2

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Вот решение)
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Answer 3

To solve the expression, follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition, and Subtraction):

Step 1: Simplify the expression inside the parentheses. -2 5/18 - 5 1/12 + 1 2/9

First, let's convert all the mixed fractions to improper fractions: -2 5/18 = -41/18 -5 1/12 = -61/12 1 2/9 = 11/9

Now, the expression becomes: (-41/18) - (61/12) + (11/9)

Step 2: Find the common denominator for the fractions (the least common multiple of 18, 12, and 9, which is 36).

(-41/18) = (-41 * 2) / (18 * 2) = -82/36 (-61/12) = (-61 * 3) / (12 * 3) = -183/36 (11/9) = (11 * 4) / (9 * 4) = 44/36

The expression now becomes: (-82/36) - (183/36) + (44/36)

Step 3: Combine the fractions: (-82/36) - (183/36) + (44/36) = (-82 - 183 + 44) / 36 = (-221) / 36

Step 4: Divide the result by (0.81 / 0.4): (-221 / 36) * (0.81 / 0.4)

Step 5: Calculate the division (0.81 / 0.4): (0.81 / 0.4) = 2.025

Step 6: Multiply the results: (-221 / 36) * 2.025

Step 7: Calculate the final result: (-221 * 2.025) / 36 ≈ -12.419444...

So, the approximate result of the expression is -12.4194.