Subtract 7 from 17 Blocks: Visual Mathematics Problem

Basic Subtraction with Visual Block Models

If we have 17 blocks and we remove 7 blocks, how many blocks will remain

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

If we have 17 blocks and we remove 7 blocks, how many blocks will remain

2

Step-by-step solution

To solve this problem, we will use simple subtraction, following these steps:

  • Step 1: Identify the initial quantity of blocks, which is 17.

  • Step 2: Identify the quantity to be removed, which is 7 blocks.

  • Step 3: Perform the subtraction to find the remaining quantity of blocks:

Initial quantity=17Blocks removed=7Remaining quantity=177 \begin{aligned} \text{Initial quantity} & = 17 \\ \text{Blocks removed} & = 7 \\ \text{Remaining quantity} & = 17 - 7 \end{aligned}

By calculating 177 17 - 7 , we find that the remaining quantity is 10 10 .

Therefore, the solution to the problem is 10 10 .

3

Final Answer

10 10

Key Points to Remember

Essential concepts to master this topic
  • Rule: Subtraction means taking away or removing objects from a group
  • Technique: Count total blocks (17), then remove 7: 17 - 7 = 10
  • Check: Add remaining blocks (10) and removed blocks (7): 10 + 7 = 17 ✓

Common Mistakes

Avoid these frequent errors
  • Confusing subtraction with addition operation
    Don't add 17 + 7 = 24 when the problem asks to remove blocks! This gives way too many blocks because you're adding instead of taking away. Always identify if you need to take away (subtract) or combine (add) based on the problem words.

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

How do I know when to subtract instead of add?

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Look for key words like 'remove', 'take away', 'subtract from', or 'how many remain'. These tell you to subtract! Words like 'total', 'combine', or 'altogether' mean add.

Can I count the blocks in the picture to solve this?

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Yes! The visual shows blocks you can count. Count all blocks first (17), then imagine crossing out 7 blocks. Count what's left to get your answer.

What if I get confused about which number comes first?

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In subtraction, the bigger number usually comes first. Think: 'Start with 17 blocks, take away 7' becomes 177 17 - 7 .

How can I check if my subtraction is correct?

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Use addition to check! Add your answer to the number you subtracted. If you get the original number, you're right: 10+7=17 10 + 7 = 17

Why do we use blocks to show math problems?

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Blocks help you see the math! Instead of just numbers, you can visualize taking away objects. This makes subtraction easier to understand and remember.

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