Question

А) 18 - 10,5 : 2,5 + 0,5б) (18 - 10,5) : (2,5 + 0,5)решить по действиям

Answer 1

Ответ:

Пошаговое объяснение:

а) 18 - 10,5 : 2,5 + 0,5=

   18 - 4,2 + 0,5 =

   13,8 + 0,5 =

    14,3

б) (18 - 10,5) : (2,5 + 0,5) =

     7,5 : 3 =

      2,5

Answer 2

To solve these expressions, let's follow the order of operations, which is commonly remembered using the acronym PEMDAS:

P - Parentheses E - Exponents MD - Multiplication and Division (from left to right) AS - Addition and Subtraction (from left to right)

a) 18 - 10.5 : 2.5 + 0.5

Step 1: Perform Division first 18 - (10.5 / 2.5) + 0.5

Step 2: Perform the Division operation 18 - 4.2 + 0.5

Step 3: Perform Addition and Subtraction from left to right (18 - 4.2) + 0.5 13.8 + 0.5

Step 4: Perform the final Addition 14.3

So, the result of the expression a) is 14.3.

b) (18 - 10.5) : (2.5 + 0.5)

Step 1: Perform the operations within the parentheses (7.5) : (3)

Step 2: Perform the Division operation 7.5 / 3

Step 3: Calculate the final Division 2.5

So, the result of the expression b) is 2.5.