Exploring Addition with Regrouping for 1st Graders

The video tutorial introduces a worksheet focused on the associative property in mathematics. It explains how three numbers can be grouped in different ways to achieve the same result, using both addition and subtraction examples. The tutorial then demonstrates how to regroup numbers to simplify addition problems, especially with larger numbers. The video concludes with encouragement to practice and subscribe for more content.

What is the name of the worksheet introduced in the video?

• Let's Add

• Let's Subtract

• Let's Regroup to Add

• Let's Multiply

What does the associative property state?

• Three numbers can be grouped in different ways and the result will be the same.

• Numbers can be multiplied in any order and the product will be the same.

• Numbers can be added in any order and the sum will be the same.

• Three numbers can be subtracted in any order and the difference will be the same.

Which of the following is an example of the associative property?

• 3 * 2 = 6 and 2 * 3 = 6

• 3 + 2 = 5 and 2 + 3 = 5

• 3 / 2 = 1.5 and 2 / 3 = 0.67

• 3 - 2 = 1 and 2 - 3 = -1

What does 'regrouping' mean in the context of addition?

• Changing the numbers to their decimal forms.

• Changing the numbers to their negative counterparts.

• Changing the way numbers are grouped to make addition easier.

• Changing the order of numbers in subtraction.

In the example 18 + 8, what is the first step in regrouping?

• Group ten ones to make a new ten.

• Subtract the smaller number from the larger number.

• Add the tens first.

• Add the ones first.

What is the sum of 18 + 8 after regrouping?

• 24

• 25

• 26

• 27

In the example 23 + 19, how many tens are there after regrouping?

• 3

• 5

• 4

• 6

What is the sum of 23 + 19 after regrouping?

• 41

• 42

• 44

• 43

In the example 7 + 46, what is the new ten formed after regrouping?

• 10

• 40

• 20

• 30

What is the sum of 7 + 46 after regrouping?

• 54

• 55

• 53

• 52