What is the first step that should be performed to find the value of this expression?
150 + 23 x (42 - 7) + 31
1. Add 150 + 23
2. Multiply 23 x 42.
3. Add 7 + 31.
4. Subtract 42 - 7.
I think the answer is "Add 150 + 23", am i right?
PEMDAS says you should do 42-7 first
150 + 23 x (42 - 7) + 31
150 + 23 x 35 + 31
150 + 805 + 31
,,,
clearly doing 150+23 first is way wrong, since multiplication is done before addition
Yes, you are correct. The first step to finding the value of the expression 150 + 23 x (42 - 7) + 31 is to perform the addition of 150 + 23.
Actually, the first step that should be performed to find the value of the expression is to perform the calculation inside the parentheses, (42 - 7). This is known as the Order of Operations or PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction). So, the correct first step is to subtract 42 - 7.
Here's the correct order of steps to find the value of the expression:
1. Subtract 42 - 7. (35)
2. Multiply 23 by the result of step 1. (23 x 35 = 805)
3. Add 150 to the result of step 2. (150 + 805 = 955)
4. Add 31 to the result of step 3. (955 + 31 = 986)
Therefore, the final answer is 986.