calculate the following and show work
12-(-4)-9=
I'll be glad to check your answer.
(-4)-9=5
12-5=7
I don't like the way Tom did this
proper way:
12 - (-4) - 9
= 12 + 4 - 9
= 16 - 9
= 7
To calculate the expression 12 - (-4) - 9, we need to follow the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).
Step 1: Simplify the double negatives within parentheses.
-(-4) = 4
After simplifying within the parentheses, the expression becomes:
12 + 4 - 9
Step 2: Perform addition and subtraction from left to right.
12 + 4 = 16
16 - 9 = 7
Therefore, the value of 12 - (-4) - 9 is 7.