Question

3*9+(21-4), 18:(16-7)*2 определить порядок действий

Answer 1

  2    3   1                                2     1  3
3*9+(21-4)=44;                     18:(16-7)*2=4

1) 21-4=17                             1) 16-7=9
2) 3*9=27                              2)18:9=2
3) 27+17= 44                         3)2*2=4

Answer 2

Сначало в скобках, потом умножение и деление, затем сложение и вычитание
3×9+(21-4)= 3×9+17=27-17=10
18÷(16-7)×2= 18÷9×2=2×2=4

Answer 3

Order of Operations and Calculation

To determine the order of operations and calculate the given expression 3*9+(21-4), 18:(16-7)*2, we need to follow the standard order of operations, which is Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

Let's break down the expression step by step:

1. Parentheses: Solve the expression inside the parentheses first. 2. Multiplication and Division: Perform any multiplication or division from left to right. 3. Addition and Subtraction: Finally, perform any addition or subtraction from left to right.

Now, let's calculate the given expression step by step.

Calculation Steps

1. Parentheses: - Inside the parentheses, (21-4) equals 17.

2. Multiplication and Division: - Now, we have 3*9 + 17, 18:(16-7)*2. - 3*9 equals 27.

3. Addition and Subtraction: - So, the expression becomes 27 + 17, 18:(16-7)*2. - 27 + 17 equals 44. - 16-7 equals 9. - 18 divided by 9 equals 2. - Finally, 2 multiplied by 2 equals 4.

Final Result

- Therefore, the value of the given expression 3*9+(21-4), 18:(16-7)*2 is 44, 4.

The calculation follows the standard order of operations, and the final result is obtained by solving the expression step by step.