Calculate Step-by-Step: Solving 9+3-1 Using Basic Arithmetic

Basic Arithmetic with Left-to-Right Operations

9+31= 9+3-1=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:03 In math, addition and subtraction are buddies! They're on the same level in the order of operations. So, when you see them together, just solve from left to right.
00:13 And there you have it! That's the solution!

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

9+31= 9+3-1=

2

Step-by-step solution

According to the rules of the order of arithmetic operations, we will work to solve the exercise from left to right:

9+3=11

11-1=10

 

And this is the solution!

3

Final Answer

11 11

Key Points to Remember

Essential concepts to master this topic
  • Order Rule: Work from left to right when operations have equal priority
  • Technique: Calculate 9+3=12 first, then 12-1=11 for final answer
  • Check: Verify by recalculating: 9+3=12, then 12-1=11 ✓

Common Mistakes

Avoid these frequent errors
  • Calculating subtraction before addition
    Don't calculate 3-1=2 first then 9+2=11! This ignores left-to-right order and can lead to confusion with more complex problems. Always follow left-to-right order for same-priority operations.

Practice Quiz

Test your knowledge with interactive questions

\( 0:7+1= \)

FAQ

Everything you need to know about this question

Why do I work from left to right instead of doing subtraction first?

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Addition and subtraction have equal priority in order of operations. When operations have the same priority, we always work from left to right. This keeps our calculations organized and consistent!

What if I accidentally did 9+(3-1) instead?

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That would give you 9+2=11, which happens to be the same answer! But this is not correct reasoning. Without parentheses, you must work left to right: 9+3-1.

How can I remember the left-to-right rule?

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Think of it like reading! We read from left to right, so we calculate from left to right too. This applies to addition/subtraction and multiplication/division when they appear together.

Does this rule apply to harder problems too?

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Yes! Whether it's 158+3 15-8+3 or 20÷4×2 20÷4×2 , always work from left to right when operations have equal priority. This builds good habits for algebra!

What should I do if I get confused about order?

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Write out each step clearly! For 9+3-1, write: Step 1: 9+3=12, then Step 2: 12-1=11. Breaking it down helps you stay organized.

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