Expanding by Place Value

The video tutorial draws a parallel between completing chores and solving math problems by breaking them into smaller, manageable parts. It introduces the concept of decomposing numbers by place value to simplify addition. The tutorial provides examples of adding two-digit numbers using expanded form, demonstrating the process step-by-step. It concludes by summarizing the steps and emphasizing the effectiveness of this strategy in making addition easier.

What is the main idea behind breaking down chores or numbers into smaller parts?

• To avoid doing them

• To make them more complicated

• To make them take longer

• To make them easier to manage

How can the number 45 be decomposed using place value?

• 45 = 50 - 5

• 45 = 40 + 5

• 45 = 20 + 25

• 45 = 30 + 15

In the example 42 + 26, what is the sum of the tens place values?

• 40

• 100

• 60

• 80

What is the expanded form of the number 56?

• 60 + 5

• 40 + 16

• 55 + 1

• 50 + 6

Which of the following is NOT a step in using expanded form to add numbers?

• Regroup if necessary

• Add the tens and ones separately

• Multiply the numbers

• Write the first number in expanded form