Question

(20-22,5:2,1)×6,4+9,2найти значение выражения

Answer 1

Получается 126,2285714286,либо 126 целых 48/210

Answer 2

To evaluate the expression (20-22.5:2.1)×6.4+9.2, you 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 break down the expression step by step:

1. (20 - 22.5) / 2.1 First, perform the operation inside the parentheses: 20 - 22.5 = -2.5 Now divide it by 2.1: -2.5 / 2.1 ≈ -1.19048 (rounded to 5 decimal places)

2. Now, we have (-1.19048) × 6.4 Multiply the result from the previous step by 6.4: -1.19048 × 6.4 ≈ -7.61904 (rounded to 5 decimal places)

3. Finally, add 9.2 to the result: -7.61904 + 9.2 ≈ 1.58096 (rounded to 5 decimal places)

So, the value of the expression is approximately 1.58096.