Solve the Expression: 29 - 9 + 25 | Multiple Operations Practice

Q: What if I accidentally get a negative number?

If you get a negative result like $ -5 $, you probably did the addition first. Start over and work left to right: subtraction first, then addition.

Q: Does it matter that we have both subtraction and addition?

Not really! Since addition and subtraction have equal priority, we simply work from left to right. If there were parentheses or multiplication, that would change things!

Q: What's the most important thing to remember?

Left to right! When operations have the same priority level, always work from left to right. This is a fundamental rule that applies to many math problems.

Basic Arithmetic with Left-to-Right Operations

Solve:

$29 - 9 + 25$

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Understand the problem

Solve:

$29 - 9 + 25$

Step-by-step solution

First, perform the subtraction: $29 - 9 = 20$

Next, perform the addition: $20 + 25 = 45$

Final Answer

Key Points to Remember

Essential concepts to master this topic

Order Rule: Addition and subtraction work left to right when same priority
Technique: First calculate 29 - 9 = 20, then 20 + 25 = 45
Check: Work backwards: 45 - 25 = 20, then 20 + 9 = 29 ✓

Common Mistakes

Avoid these frequent errors

Doing addition before subtraction
Don't calculate 9 + 25 = 34 first, then 29 - 34 = -5! This ignores left-to-right order and gives negative results. Always work from left to right when operations have equal priority.

Practice Quiz

Test your knowledge with interactive questions

$$ 8 - 2 + 6 = $$

FAQ

Everything you need to know about this question

Why can't I add 9 + 25 first since addition is easier?

Great question! Even though addition might feel easier, we must follow the left-to-right rule when operations have the same priority. This ensures everyone gets the same answer!

What if I accidentally get a negative number?

If you get a negative result like $-5$ , you probably did the addition first. Start over and work left to right: subtraction first, then addition.

Is there a way to check my work without working backwards?

Yes! You can use a calculator or break it into smaller steps. Write each step clearly:

Step 1: $29 - 9 = 20$
Step 2: $20 + 25 = 45$

Does it matter that we have both subtraction and addition?

Not really! Since addition and subtraction have equal priority, we simply work from left to right. If there were parentheses or multiplication, that would change things!

What's the most important thing to remember?

Left to right! When operations have the same priority level, always work from left to right. This is a fundamental rule that applies to many math problems.

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