Question

(18 1/4-17 5/6)*8 2/5+6 1/2 СРОЧНО!

Answer 1

1) 18/1/4-17/5/6=5/12

2)5/12*8/2/5=3/1/2

3)3/1/2/+6/1/2/=10

Ответ: 10

Answer 2

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

Step 1: Simplify the subtraction 18 1/4 - 17 5/6

To subtract these mixed numbers, we need to find a common denominator. The common denominator of 4 and 6 is 12.

18 1/4 = (18 * 4 + 1) / 4 = 73 / 4 17 5/6 = (17 * 6 + 5) / 6 = 107 / 6

Now, we can subtract:

73 / 4 - 107 / 6

To subtract fractions, we need to have a common denominator. The common denominator of 4 and 6 is 12.

73 / 4 = (73 * 3) / (4 * 3) = 219 / 12 107 / 6 = (107 * 2) / (6 * 2) = 214 / 12

Now we can subtract:

219 / 12 - 214 / 12 = (219 - 214) / 12 = 5 / 12

Step 2: Multiply the result from Step 1 by 8 2/5 5 / 12 * 8 2/5

To multiply a fraction by a mixed number, we first convert the mixed number into an improper fraction.

8 2/5 = (8 * 5 + 2) / 5 = 42 / 5

Now we can multiply:

(5 / 12) * (42 / 5) = (5 * 42) / (12 * 5) = 210 / 60

Step 3: Add the result from Step 2 to 6 1/2 210 / 60 + 6 1/2

To add a fraction to a mixed number, we first convert the mixed number into an improper fraction.

6 1/2 = (6 * 2 + 1) / 2 = 13 / 2

Now we can add:

(210 / 60) + (13 / 2)

To add fractions, we need to have a common denominator. The common denominator of 60 and 2 is 120.

210 / 60 = (210 * 2) / (60 * 2) = 420 / 120 13 / 2 = (13 * 60) / (2 * 60) = 780 / 120

Now we can add:

(420 / 120) + (780 / 120) = (420 + 780) / 120 = 1200 / 120 = 10

Therefore, the result of the expression (18 1/4 - 17 5/6) * 8 2/5 + 6 1/2 is 10.