Understanding Expanded Form in Addition

The video tutorial introduces the break apart strategy for adding three-digit numbers using expanded form. It begins with a review of necessary materials and a vocabulary term, 'expanded form.' The instructor explains how to break down numbers into their place values and demonstrates adding numbers using this method. Several example problems are solved step-by-step, emphasizing the importance of carrying over values. The video concludes with practice questions for students to try on their own.

What materials should you have ready before starting the lesson?

• A calculator and a notebook

• A guide, notes, pencil, and highlighter

• A computer and a textbook

• A ruler and a pen

What does the term 'expanded form' mean?

• Combining numbers to form a larger number

• Breaking apart a number to show the value of each digit

• Writing numbers in a different base

• Using numbers in a sentence

How is the number 742 expressed in expanded form?

• 70 + 40 + 2

• 700 + 40 + 2

• 7 + 40 + 20

• 700 + 4 + 2

What is the first step in adding numbers using expanded form?

• Add the numbers directly

• Write the numbers in expanded form

• Subtract the smaller number from the larger one

• Multiply the numbers

When adding 152 and 436 using expanded form, what is the sum of the tens place?

• 90

• 50

• 100

• 80

In the example of adding 459 and 213, what happens when the sum of the ones place is 12?

• The 12 is added to the hundreds place

• The 12 is ignored

• The 2 stays in the ones place and 10 is carried over to the tens place

• The 12 is written as is

What is the final sum of 459 and 213 using expanded form?

• 700

• 600

• 6720

• 672

What should you do if you forget the value of a digit?

• Ask a friend

• Guess the value

• Make a place value chart

• Use a calculator

How is the number 573 expressed in expanded form?

• 5 + 70 + 30

• 500 + 70 + 3

• 50 + 70 + 3

• 500 + 7 + 3

What is the purpose of writing numbers in expanded form?

• To convert them to fractions

• To show the value of each digit

• To simplify multiplication

• To make them look longer