Solve the Arithmetic Expression: 7+5-2 Step by Step

Q: Why do I work from left to right?

When you have addition and subtraction in the same expression, they have equal priority. The rule is to work from left to right, just like reading a sentence!

Q: What if I got 10 by doing 5 - 2 first?

You got lucky this time! $7 + (5 - 2) = 7 + 3 = 10$ happens to equal $7 + 5 - 2 = 12 - 2 = 10$, but this won't always work. Always follow the left-to-right rule.

Q: Is this the same as PEMDAS?

Yes! PEMDAS tells us that addition and subtraction have equal priority, so we work left to right. No parentheses, exponents, or multiplication here - just the MD/AS rule.

Q: How can I avoid making mistakes?

Write out each step clearly:Step 1: $7 + 5 = 12$Step 2: $12 - 2 = 10$This helps you stay organized and catch errors!

Q: What if there were more numbers?

Same rule! For $8 + 3 - 1 + 4$, work left to right: $8 + 3 = 11$, then $11 - 1 = 10$, then $10 + 4 = 14$.

Arithmetic Operations with Left-to-Right Order

$7+5-2=\text{ ?}$

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Understand the problem

$7+5-2=\text{ ?}$

Step-by-step solution

First, add 7 and 5 to get 12.

$7 + 5 = 12$

Then, subtract 2 from 12 to get 10.

$12 - 2 = 10$

Final Answer

$10$

Key Points to Remember

Essential concepts to master this topic

Order: Calculate addition and subtraction from left to right
Technique: First find 7 + 5 = 12, then 12 - 2 = 10
Check: Verify each step: 7 + 5 = 12, then 12 - 2 = 10 ✓

Common Mistakes

Avoid these frequent errors

Calculating subtraction before addition
Don't calculate 5 - 2 = 3 first, then add 7 = wrong answer of 10! This ignores the left-to-right rule and can give incorrect results in other problems. Always work from left to right when operations have equal priority.

Practice Quiz

Test your knowledge with interactive questions

Solve the following equation:

$12+7-5\text{ }=$

FAQ

Everything you need to know about this question

Why do I work from left to right?

When you have addition and subtraction in the same expression, they have equal priority. The rule is to work from left to right, just like reading a sentence!

What if I got 10 by doing 5 - 2 first?

You got lucky this time! $7 + (5 - 2) = 7 + 3 = 10$ happens to equal $7 + 5 - 2 = 12 - 2 = 10$ , but this won't always work. Always follow the left-to-right rule.

Is this the same as PEMDAS?

Yes! PEMDAS tells us that addition and subtraction have equal priority, so we work left to right. No parentheses, exponents, or multiplication here - just the MD/AS rule.

How can I avoid making mistakes?

Write out each step clearly:

Step 1: $7 + 5 = 12$
Step 2: $12 - 2 = 10$

This helps you stay organized and catch errors!

What if there were more numbers?

Same rule! For $8 + 3 - 1 + 4$ , work left to right: $8 + 3 = 11$ , then $11 - 1 = 10$ , then $10 + 4 = 14$ .

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