Solve 51-3 Using Two Jumps on a Number Line

Subtraction with Two-Step Decomposition

Solve the subtraction exercise,

using two jumps on the number line below:

513= 51-3=

11122251

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the subtraction exercise,

using two jumps on the number line below:

513= 51-3=

11122251

2

Step-by-step solution

To solve 513 51 - 3 using two jumps on a number line, follow these steps:

  • Step 1: Start at 51 on the number line.
  • Step 2: Perform the first jump by subtracting 1: 511=50 51 - 1 = 50 .
    Now, we are at 50 on the number line.
  • Step 3: Perform the second jump by subtracting 2: 502=48 50 - 2 = 48 .
    Now, we are at 48 on the number line.

Therefore, the result of the subtraction 513 51 - 3 is 48 48 .

3

Final Answer

48 48

Key Points to Remember

Essential concepts to master this topic
  • Strategy: Break the subtrahend into smaller, easier parts
  • Technique: Split 3 into 1 + 2, then subtract each: 5112 51 - 1 - 2
  • Check: Verify by counting backwards: 51 → 50 → 48 ✓

Common Mistakes

Avoid these frequent errors
  • Jumping the wrong direction on the number line
    Don't move right when subtracting = you'll get 54 instead of 48! Moving right means adding, not subtracting. Always move left on the number line when subtracting.

Practice Quiz

Test your knowledge with interactive questions

If we have 85 blocks in total, how many blocks will remain if we remove 4 tens and 1 one?

FAQ

Everything you need to know about this question

Why can't I just subtract 3 in one jump?

+

You absolutely can! This problem asks you to use two jumps to help you practice breaking down numbers. This strategy is super helpful for larger subtractions!

How do I decide how to split the number 3?

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You can split 3 many ways: 1 + 2, 2 + 1, or even 1 + 1 + 1. The problem shows 1 + 2, but any combination that adds to 3 works perfectly!

What if I get confused about which direction to move?

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Remember: Subtraction = move LEFT on the number line. Think of it as going backwards or taking steps away from where you started.

Is this method useful for bigger numbers?

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Yes! Breaking down subtraction helps with problems like 738 73 - 8 . You could do 7335=705=65 73 - 3 - 5 = 70 - 5 = 65 to make it easier!

How do I know my jumps add up correctly?

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Always check that your jump sizes equal the original number you're subtracting. Here: 1 + 2 = 3, so our jumps are correct!

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