Question

2целых 1/2 * 48целых 2/3 - 3целых 2/3 * 5целых +5/12 * 36целых дам 30 баллов

Answer 1

5/2×146/3-2/3×5+5/12×36

480/6-10/3+180/12

80-10/3+15=250/3+45/3=295/3

Answer 2

To calculate the expression you provided, let's break it down step by step:

2 and 1/2 can be written as an improper fraction: 5/2. 48 and 2/3 can be written as an improper fraction: 146/3. 3 and 2/3 can be written as an improper fraction: 11/3. 5 and 5/12 can be written as an improper fraction: 65/12. 36 can be written as an improper fraction: 36/1.

Now we can rewrite the expression using the improper fractions:

(5/2) * (146/3) - (11/3) * (65/12) + (5/12) * (36/1)

To simplify this expression, we need to perform the operations in the following order: multiplication, subtraction, and addition.

First, let's perform the multiplications:

(5/2) * (146/3) = (5 * 146) / (2 * 3) = 730/6 = 365/3

(11/3) * (65/12) = (11 * 65) / (3 * 12) = 715/36

(5/12) * (36/1) = (5 * 36) / (12 * 1) = 180/12 = 15/1 = 15

Now we can substitute these values back into the expression:

365/3 - 715/36 + 15

To combine the fractions, we need to find a common denominator:

The common denominator for 3 and 36 is 36.

(365/3) * (12/12) = 4380/36

(715/36) * (1/1) = 715/36

Now we can rewrite the expression:

(4380/36) - (715/36) + 15

To subtract the fractions, we need to have the same denominator:

(4380 - 715)/36 + 15 = 3665/36 + 15

To add these fractions, we need to find a common denominator:

The common denominator for 36 and 1 is 36.

(3665/36) * (1/1) = 3665/36

Now we can rewrite the expression:

(3665/36) + 15

To add the fractions, we need to have the same denominator:

(3665 + 540)/36 = 4205/36

So the final result of the expression is 4205/36.

To determine the number of points, we need to compare this result to 30:

4205/36 = 117.0278...

Since 117.0278... is not equal to 30, the expression does not evaluate to 30.