Visualizing Subtraction on a Number Line

Core Concepts

Learn how to use a number line as a visual tool for solving subtraction problems by starting at the first number and jumping backward.

Visualizing Subtraction on a Number Line

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How can a number line help you solve a subtraction problem?

It helps you see the numbers and count backward. You find the first number, then jump to the left to subtract.

To solve $$7 - 4$$ on a number line, where do you start and which way do you move?

You start at the number $7$ and make $4$ jumps to the left (backward).

If you start at $7$ and jump back $4$ spaces on a number line, where do you land?

You land on $3$. So, $7 - 4 = 3$.

Use a number line in your mind to solve: $$10 - 2 = ?$$

Start at $10$ and jump back $2$ spaces. You land on $8$.

Use a number line in your mind to solve: $$5 - 5 = ?$$

Start at $5$ and jump back $5$ spaces. You land on $0$.

Use a number line in your mind to solve: $$9 - 5 = ?$$

$$4$$

Use a number line in your mind to solve: $$6 - 1 = ?$$

$$5$$

Use a number line in your mind to solve: $$8 - 4 = ?$$

$$4$$

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