Adding Multi-Digit Numbers with Open Number Lines

This video tutorial teaches how to add multi-digit whole numbers using an open number line. It explains the importance of breaking numbers into expanded form and demonstrates the process with two examples. The tutorial emphasizes understanding place value changes during addition.

What is an open number line?

• A number line with only even numbers

• A number line used only for subtraction

• A number line that can start and end anywhere

• A number line with fixed start and end points

Why is expanded form important in using an open number line?

• It breaks down numbers to make addition easier

• It simplifies the subtraction process

• It is used to divide numbers

• It helps in multiplying numbers

What is the expanded form of 12,517?

• 10,000 + 2,000 + 500 + 10 + 7

• 10,000 + 2,000 + 50 + 17

• 12,000 + 500 + 17

• 1,000 + 2,000 + 500 + 10 + 7

When adding 23,674 and 12,517, what is the result after the first jump of 10,000?

• 33,674

• 33,674

• 33,674

• 33,674

What is the final result of adding 23,674 and 12,517 using an open number line?

• 35,191

• 36,191

• 36,091

• 36,191

What is the expanded form of 15,397?

• 10,000 + 5,000 + 300 + 90 + 7

• 15,000 + 300 + 97

• 1,000 + 5,000 + 300 + 90 + 7

• 10,000 + 5,000 + 30 + 97

After adding 10,000 to 42,321, what is the new number?

• 52,321

• 52,321

• 52,321

• 52,321

What is the result after adding 5,000 to 52,321?

• 57,321

• 57,321

• 57,321

• 57,321

What is the final result of adding 42,321 and 15,397 using an open number line?

• 57,718

• 57,718

• 57,718

• 57,718

What did you learn in this lesson?

• How to subtract using an open number line

• How to add multi-digit numbers using an open number line

• How to multiply using an open number line

• How to divide using an open number line