Mastering 3-Digit Addition with Regrouping

Miss Cor Newkeep from PS1 teaches how to add three-digit numbers using expanded form, focusing on regrouping. The lesson begins with an introduction to expanded form and its benefits in understanding place value. The numbers 436 and 194 are expanded to show the value of each digit. The expanded numbers are then added step by step, demonstrating the process of regrouping. Finally, the results are combined to find the total, with the final answer being 630.

What will you learn in this lesson?

• How to divide three-digit numbers

• How to multiply three-digit numbers

• How to add three-digit numbers using expanded form

• How to subtract three-digit numbers

Why is expanded form a useful strategy?

• It simplifies subtraction

• It makes division easier

• It helps in understanding multiplication

• It uses place value to add numbers

What is the value of the digit 4 in the number 436?

• 4000

• 400

• 40

• 4

What is the value of the digit 3 in the number 436?

• 3

• 30

• 300

• 3000

What is the value of the digit 6 in the number 436?

• 60

• 6

• 6000

• 600

What is the value of the digit 1 in the number 194?

• 1

• 10

• 100

• 1000

What is the value of the digit 9 in the number 194?

• 9000

• 900

• 90

• 9

What is the value of the digit 4 in the number 194?

• 4000

• 4

• 40

• 400

What is the sum of 6 and 4 in the one's place?

• 9

• 8

• 10

• 11

What is the final sum of 436 and 194?

• 620

• 630

• 640

• 650