Subtraction with Blocks: Calculate 34 - 8 Using Visual Models

Visual Subtraction with Base-Ten Models

If we have 34 blocks and we remove 8 blocks, how many blocks will remain?

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Step-by-step written solution

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1

Understand the problem

If we have 34 blocks and we remove 8 blocks, how many blocks will remain?

2

Step-by-step solution

To solve this problem, we'll carry out the following steps:

  • Step 1: Identify the total number of blocks initially present, which is given as 34.
  • Step 2: Identify the number of blocks to be removed, which is provided as 8.
  • Step 3: Use subtraction to calculate the remaining number of blocks after some have been removed.

Now, let's perform the calculation:

Starting with 34 blocks, and needing to remove 8 blocks, we calculate:

Remaining=348 \text{Remaining} = 34 - 8

Calculating this, we have:

348=26 34 - 8 = 26

Therefore, the number of blocks that will remain is 26 26 .

3

Final Answer

26 26

Key Points to Remember

Essential concepts to master this topic
  • Rule: Use visual blocks to represent numbers before subtracting
  • Technique: Count 34 blocks, cross out 8 blocks, count remaining
  • Check: Add answer back: 26 + 8 = 34 ✓

Common Mistakes

Avoid these frequent errors
  • Counting removed blocks instead of remaining blocks
    Don't count the 8 blocks you removed = wrong answer of 8! This gives you what was taken away, not what's left. Always count the blocks that remain after removal.

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

Why should I use blocks instead of just doing 34 - 8?

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Visual blocks help you see exactly what subtraction means! They show that subtraction is taking away objects, making the concept clearer than just memorizing number facts.

How do I know which blocks to remove?

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It doesn't matter which specific blocks you remove - just make sure you remove exactly 8 blocks total. The remaining count will always be the same.

What if I lose track while counting?

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Organize your counting! Group blocks by tens when possible, or mark the ones you've removed. You can also count twice to double-check your work.

Can I use this method for bigger numbers?

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Yes! Visual models work for any subtraction problem, though for very large numbers you might use base-ten blocks (rods for tens, squares for hundreds) to make counting easier.

How do I check if my answer is right?

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Use addition to check subtraction! Add your answer to what you removed: 26+8=34 26 + 8 = 34 . If you get the original number, you're correct!

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