Question

3. Определи порядок действий в выражениях. Прочитай и найди значения выражений. 9 + 12:2 50 - 9.2 8.5 + 27:3 (78 - 75). 2 2.(38 - 32) (7-4).8 + 50 (6 + 6): 2 25 + 7.2 100 - (18 - 9):4. пожалуйста помогите определить порядок действий выражениях. прочитай и найди значения выражений.​

Answer 1

Ответ:

9+12:2=15

(1) 12:2=6

(2) 9+6=15

(78-75):2=1,5

(1) 78-75-3

(2) 3:2=1,5

(6+6):2=6

(1) 6+6=12

(2) 12:2=6

50-9,2= 40,8

2:(38-32)=0,33

(1) 38-32-6

(2) 2:6=0,33

25+7,2= 32,2

8,5+27:3=17,5

(1) 27:3=9

(2) 8,5+9=17,5

(7-4):8+50=50,375

(1) 7-4-3

(2) 3:8=0,375

(3) 0,375+50=50,375

100-(18-9)-4-77

(1) 18-9-9

(2) 100-9-81

(3) 81-4-77

Пошаговое объяснение:

надеюсь верно

Answer 2

Order of Operations in Expressions

To determine the order of operations in mathematical expressions, we follow the acronym PEMDAS, which stands for:

1. Parentheses: Perform operations inside parentheses first. 2. Exponents: Evaluate any exponentiation. 3. Multiplication and Division: Perform multiplication and division from left to right. 4. Addition and Subtraction: Perform addition and subtraction from left to right.

Now let's apply these rules to the given expressions and find their values.

1. 9 + 12 ÷ 2 - 50 - 9.2 + 8.5

Following the order of operations, we first perform the division: 12 ÷ 2 = 6.

Then, we perform the addition and subtraction from left to right: 9 + 6 - 50 - 9.2 + 8.5 = -35.7.

Therefore, the value of the expression is -35.7.

2. 27 ÷ 3 * (78 - 75)

Again, following the order of operations, we first perform the subtraction inside the parentheses: 78 - 75 = 3.

Then, we perform the division: 27 ÷ 3 = 9.

Finally, we perform the multiplication: 9 * 3 = 27.

Therefore, the value of the expression is 27.

3. 2 + 2 * (38 - 32) + (7 - 4) * 8

Following the order of operations, we first perform the subtraction inside the parentheses: 38 - 32 = 6 and 7 - 4 = 3.

Then, we perform the multiplication: 2 * 6 = 12 and 3 * 8 = 24.

Finally, we perform the addition: 2 + 12 + 24 = 38.

Therefore, the value of the expression is 38.

4. 50 + (6 + 6) ÷ 2 - 25 + 7.2 - (18 - 9) ÷ 4

Following the order of operations, we first perform the addition inside the parentheses: 6 + 6 = 12 and 18 - 9 = 9.

Then, we perform the division: 12 ÷ 2 = 6 and 9 ÷ 4 = 2.25.

Next, we perform the addition and subtraction from left to right: 50 + 6 - 25 + 7.2 - 2.25 = 36.95.

Therefore, the value of the expression is 36.95.

I hope this helps! Let me know if you have any further questions.