Question

12) 40- (2550 : 204 - 6,9).6,7;14) 7,2-3,8+ (3,24 - 2,1312): 0,42;​

Answer 1

Ответ:

12) 2.48

14) 30

Пошаговое объяснение:

12)

1)2550:204=12,5

2)12,5-6,9=5,6

3)5,6*6,7=37,52

4)40-37,52=2,48

14)

1)3,24-2,1312=1,1088

2)1,1088:0,42=2,64

3)7,2*3,8=27,36

4)27,36+2,64=30

Answer 2

To solve the given expression, you can follow the order of operations (PEMDAS/BODMAS - Parentheses/Brackets, Exponents/Orders, Multiplication and Division, Addition and Subtraction):

Let's break down the expression step by step:

1. Calculate inside the parentheses (brackets) first:

For the first expression: 40 - (2550 / 204 - 6.9) * 6.7

1.1. Calculate inside the innermost set of parentheses (division): 2550 / 204 = 12.5

Now the expression becomes: 40 - (12.5 - 6.9) * 6.7

1.2. Calculate the subtraction inside the second set of parentheses: 12.5 - 6.9 = 5.6

Now the expression becomes: 40 - 5.6 * 6.7

1.3. Calculate the multiplication: 5.6 * 6.7 = 37.52

Now the expression becomes: 40 - 37.52

1.4. Finally, calculate the subtraction: 40 - 37.52 = 2.48

So, the value of the first expression is 2.48.

Now, for the second expression:

7.2 - 3.8 + (3.24 - 2.1312) / 0.42

2.1. Calculate inside the innermost set of parentheses (subtraction): 3.24 - 2.1312 = 1.1088

Now the expression becomes: 7.2 - 3.8 + 1.1088 / 0.42

2.2. Calculate the division: 1.1088 / 0.42 ≈ 2.640

Now the expression becomes: 7.2 - 3.8 + 2.64

2.3. Calculate the addition and subtraction: 7.2 - 3.8 + 2.64 ≈ 5.04

So, the value of the second expression is approximately 5.04.

In summary:

1. The value of the first expression is 2.48.
2. The value of the second expression is approximately 5.04.