Solve the Expression: 9-3+4-2 Step by Step

Order of Operations with Left-to-Right Evaluation

Solve:

93+42 9-3+4-2

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Step-by-step video solution

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00:00 Given that only addition and subtraction are present we can solve the expression from left to right
00:14 This is the solution!

Step-by-step written solution

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1

Understand the problem

Solve:

93+42 9-3+4-2

2

Step-by-step solution

According to the rules of the order of operations, we will solve the exercise from left to right since it only has addition and subtraction operations:

93=6 9-3=6

6+4=10 6+4=10

102=8 10-2=8

3

Final Answer

8

Key Points to Remember

Essential concepts to master this topic
  • Rule: Addition and subtraction have equal priority, work left to right
  • Technique: Calculate step by step: 9-3=6, then 6+4=10, then 10-2=8
  • Check: Verify by grouping: (9-3)+(4-2) = 6+2 = 8 ✓

Common Mistakes

Avoid these frequent errors
  • Doing all subtraction before addition
    Don't calculate 9-3-2=4 then add 4 to get 8! This ignores left-to-right order and gives wrong results. Always work through addition and subtraction operations from left to right in the exact order they appear.

Practice Quiz

Test your knowledge with interactive questions

\( 8 - 2 + 6 = \)

FAQ

Everything you need to know about this question

Why can't I just do all the subtraction first?

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Addition and subtraction have equal priority in order of operations! When operations have equal priority, you must work from left to right, not group them by type.

What if I accidentally did it wrong and got 10?

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You probably calculated 9+432 9+4-3-2 instead! Remember to follow the exact order written: 9-3 first, then +4, then -2.

Can I use parentheses to make this easier?

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Absolutely! You can write it as ((93)+4)2 ((9-3)+4)-2 to clearly show the left-to-right order. This helps avoid mistakes!

Is there a quick way to check my answer?

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Yes! Try rearranging: 93+42=(9+4)(3+2)=135=8 9-3+4-2 = (9+4)-(3+2) = 13-5 = 8 . If you get the same answer both ways, you're correct!

What's the most important thing to remember?

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When you see only addition and subtraction, work from left to right like reading a book. Don't jump around or group operations - follow the exact sequence given!

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