Calculate the Sum: 20 Bronze Coins + 17 Silver Coins

Addition with Different Coin Types

Leah and Ron have a collection of coins. Leah has 20 bronze coins and Ron has 17 silver coins.

How many coins do Leah and Ron have altogether?

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Leah and Ron have a collection of coins. Leah has 20 bronze coins and Ron has 17 silver coins.

How many coins do Leah and Ron have altogether?

2

Step-by-step solution

To solve this problem, we will determine the total number of coins by adding Leah's coins to Ron's coins:

  • Step 1: Leah has 20 bronze coins.
  • Step 2: Ron has 17 silver coins.
  • Step 3: We find the total by adding the number of coins Leah has to the number of coins Ron has.

By performing the addition:

20+17=37 20 + 17 = 37

Therefore, the total number of coins that Leah and Ron have altogether is 37 37 .

The correct answer among the choices is: 37 37 , which corresponds to choice 3.

3

Final Answer

37 37

Key Points to Remember

Essential concepts to master this topic
  • Addition Rule: Count all items together regardless of type
  • Technique: Add directly: 20 bronze + 17 silver = 37 total
  • Check: Verify by counting backwards: 37 - 20 = 17 ✓

Common Mistakes

Avoid these frequent errors
  • Treating different coin types as incompatible
    Don't think bronze and silver coins can't be added together = missing the point! The problem asks for total coins, not total value. Always focus on what the question actually asks - here it's counting all coins regardless of their material.

Practice Quiz

Test your knowledge with interactive questions

If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?

FAQ

Everything you need to know about this question

Do I need to know the value of bronze and silver coins?

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No! This problem only asks for the total number of coins, not their monetary value. Simply add the quantities: 20 + 17 = 37 coins.

Why can I add different types of coins together?

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Because we're counting coins as objects, not their values. It's like counting apples and oranges together - they're both fruits, just like bronze and silver coins are both coins!

What if the problem asked for total value instead?

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Then you'd need to know each coin's worth! But this problem specifically asks "how many coins" - that's a quantity question, so just add the numbers.

How do I avoid making calculation errors?

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Double-check your addition: 20+17 20 + 17 . You can verify by adding in parts: 20+10+7=30+7=37 20 + 10 + 7 = 30 + 7 = 37

Could this problem have a trick or be more complicated?

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No tricks here! It's straightforward addition. The different coin materials are just context to make the problem interesting - the math is simply 20+17=37 20 + 17 = 37 .

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