Solve the Expression: 11 - 2 + 4 × 2 Using Order of Operations

Order of Operations with Mixed Addition

112+4×2= 11 - 2 + 4 \times 2 =

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1

Understand the problem

112+4×2= 11 - 2 + 4 \times 2 =

2

Step-by-step solution

Start with the multiplication: 4×2=8 4 \times 2 = 8 .

Add this to the initial subtraction: 112=9 11 - 2 = 9 .

Then finish with: 9+8=17 9 + 8 = 17 .

3

Final Answer

17 17

Key Points to Remember

Essential concepts to master this topic
  • PEMDAS Rule: Always multiply before adding or subtracting
  • Technique: Calculate 4×2=8 4 \times 2 = 8 first, then work left to right
  • Check: Final answer should be 112+8=17 11 - 2 + 8 = 17

Common Mistakes

Avoid these frequent errors
  • Working strictly left to right without considering multiplication first
    Don't calculate 11 - 2 + 4 × 2 as (11 - 2 + 4) × 2 = 26! This ignores the order of operations and gives the wrong answer. Always do multiplication before addition and subtraction, regardless of position in the expression.

Practice Quiz

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\( 8 + 3 \times 2 = \)

FAQ

Everything you need to know about this question

Why can't I just work from left to right like reading?

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Mathematics has a special order called PEMDAS (Parentheses, Exponents, Multiplication/Division, Addition/Subtraction). This ensures everyone gets the same answer! Without it, 2+3×4 2 + 3 \times 4 could equal 20 or 14.

What does PEMDAS stand for again?

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Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right). Some people remember it as Please Excuse My Dear Aunt Sally!

Do I always do multiplication before addition?

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Yes, always! Even if the addition comes first in the expression like 5+2×3 5 + 2 \times 3 , you still multiply first to get 5+6=11 5 + 6 = 11 .

What if I have multiple additions and subtractions?

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After handling multiplication and division, work through addition and subtraction from left to right. So 112+8 11 - 2 + 8 becomes 9+8=17 9 + 8 = 17 .

How can I remember to check my work?

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Try the "backwards check": Start with your answer and see if you can work backwards through each step. If 178=9 17 - 8 = 9 and 9+2=11 9 + 2 = 11 , you're right!

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