Question

4 х (2 1/2 + 1 3/4) - (6 2/3 + 4 4/5) : 2​

Answer 1

Ответ:

Пошаговое объяснение:

2 1/2+1 3/4=2 2/4+1 3/4=4 1/4

4*4 1/4=4*17/4=17

6 2/3+4 4/5=6 10/15+4 12/15=11 7/15

17-11 7/15=5 8/15

Answer 2

To solve the expression, we need to follow the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Let's simplify the expression step by step:

Step 1: Deal with parentheses/brackets first.

(2 1/2 + 1 3/4) = (5/2 + 7/4) = (10/4 + 7/4) = 17/4

(6 2/3 + 4 4/5) = (20/3 + 24/5) = (100/15 + 72/15) = 172/15

Step 2: Now the expression becomes:

4 * (17/4) - (172/15) / 2

Step 3: Next, perform multiplication:

4 * (17/4) = (4/1) * (17/4) = 17

Step 4: Finally, perform division:

(172/15) / 2 = (172/15) * (1/2) = 172/30 = 86/15

Now the expression is simplified to:

17 - 86/15

To subtract these two fractions, they need to have the same denominator:

17 = (17/1) = (17/1) * (15/15) = 255/15

Now the expression becomes:

255/15 - 86/15 = (255 - 86) / 15 = 169/15

So the final result of the expression is 169/15.