Question

21,6 + (14,5 – 30,25) – (3,8 + 1,9). решите пж (с раскрытием скобок)

Answer 1

21,6 + (14,5 – 30,25) – (3,8 + 1,9) = 21,6 + 14,5 - 30,25 - 3,8 - 1,9 = ( 21,6 + 
+ 14,5 ) - ( 30,25 + 3,8 + 1,9 ) = 36,1 - 35,95 = 0,15

Answer 2

21,6+14,5-30,25-3,8-1,9= 0,15

Answer 3

To solve the expression and simplify it, let's follow the order of operations (PEMDAS/BODMAS):

P: Parentheses E: Exponents (not applicable here) MD: Multiplication and Division (from left to right) AS: Addition and Subtraction (from left to right)

Given expression: 21.6 + (14.5 – 30.25) – (3.8 + 1.9)

Step 1 (P): Solve the expressions inside the parentheses first: 21.6 + (14.5 - 30.25) - (3.8 + 1.9)

Step 2 (P): Perform the operations inside the parentheses: 21.6 + (-15.75) - (5.7)

Step 3 (AS): Perform the addition and subtraction from left to right: 21.6 - 15.75 - 5.7

Step 4 (AS): Continue performing the addition and subtraction: 5.85 - 5.7

Step 5 (AS): Final step, perform the last subtraction: 0.15

Therefore, the solution to the expression is 0.15.