Subtracting Three-Digit Numbers Using a Number Line

This lesson teaches how to subtract three-digit numbers using a number line. It explains the concept of expanded form and demonstrates how to make jumps on the number line to find the difference. Three examples are provided to illustrate the process, showing how to break down numbers into hundreds, tens, and ones, and subtract each part step-by-step. The lesson emphasizes the flexibility of number lines in counting by different increments and moving backwards.

What is the purpose of using a number line in subtraction?

• To convert numbers into fractions

• To organize numbers for counting, adding, or subtracting

• To multiply numbers

• To divide numbers

How is the number 222 represented in expanded form?

• 200 + 20 + 2

• 2 + 20 + 200

• 20 + 200 + 2

• 200 + 2 + 20

In the example of 976 minus 321, how many hundreds jumps are made?

• 4

• 3

• 2

• 1

What is the result of 495 minus 234 using a number line?

• 271

• 261

• 275

• 265

In the example of 687 minus 152, how many tens jumps are made?

• 3

• 6

• 4

• 5