Calculate the Sum: Finding 13 + 37 + 45

Q: Why should I add from left to right instead of all at once?

Adding step by step prevents mistakes! Breaking $ 13 + 37 + 45 $ into $ (13 + 37) + 45 $ makes each calculation easier to track and verify.

Q: Can I add the numbers in a different order?

Absolutely! The commutative property means $ 13 + 37 + 45 $ equals $ 45 + 13 + 37 $ or any other arrangement. Choose the order that feels easiest for you!

Q: What if I look for friendly number pairs?

Great strategy! Since $ 13 + 37 = 50 $ gives a nice round number, this pair is perfect to add first. Always look for combinations that make tens or hundreds!

Q: How do I know if 95 is the right answer?

Try adding in reverse order: $ 45 + 37 + 13 $. You can also use estimation: roughly 10 + 40 + 50 = 100, so 95 makes sense!

Q: What if I get a different answer when checking?

If your check gives a different result, slow down and recalculate both ways carefully. Double-check each step: does $ 13 + 37 $ really equal 50?

Addition with Left-to-Right Strategy

$13+37+45=$

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Step-by-step video solution

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00:00 Solve

00:03 Let's solve according to the order of mathematical operations, we'll solve from left to right

00:10 And this is the solution to the question

Step-by-step written solution

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Understand the problem

$13+37+45=$

Step-by-step solution

According to the rules of the order of operations, we solve the exercise from left to right in the most convenient way for the calculation:

$13+37=50$

$50+45=95$

Final Answer

Key Points to Remember

Essential concepts to master this topic

Rule: Addition can be performed in any order due to associative property
Technique: Group friendly numbers first: $13 + 37 = 50$ , then add 45
Check: Verify by adding in different order: $37 + 45 = 82$ , then $13 + 82 = 95$ ✓

Common Mistakes

Avoid these frequent errors

Adding all three numbers at once without grouping
Don't try to add 13 + 37 + 45 all at once = calculation errors and confusion! This makes it easy to lose track of your work and get the wrong sum. Always break multi-number addition into pairs and work step by step.

Practice Quiz

Test your knowledge with interactive questions

$$ 100-(30-21)= $$

FAQ

Everything you need to know about this question

Why should I add from left to right instead of all at once?

Adding step by step prevents mistakes! Breaking $13 + 37 + 45$ into $(13 + 37) + 45$ makes each calculation easier to track and verify.

Can I add the numbers in a different order?

Absolutely! The commutative property means $13 + 37 + 45$ equals $45 + 13 + 37$ or any other arrangement. Choose the order that feels easiest for you!

What if I look for friendly number pairs?

Great strategy! Since $13 + 37 = 50$ gives a nice round number, this pair is perfect to add first. Always look for combinations that make tens or hundreds!

How do I know if 95 is the right answer?

Try adding in reverse order: $45 + 37 + 13$ . You can also use estimation: roughly 10 + 40 + 50 = 100, so 95 makes sense!

What if I get a different answer when checking?

If your check gives a different result, slow down and recalculate both ways carefully. Double-check each step: does $13 + 37$ really equal 50?

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