Regrouping in Addition Problems

This video tutorial explains how to perform three-digit addition with regrouping. It begins with an introduction to the concept and then delves into the details of regrouping, using examples to illustrate how numbers can be represented in different ways. The tutorial covers regrouping 10 one dots into a 10 stick and 10 sticks into a 100 block. Finally, it provides a step-by-step solution to the addition problem 185 + 227, demonstrating the process of carrying over numbers and regrouping to arrive at the correct answer.

What is the first step in solving a three-digit addition problem with regrouping?

• Subtract the smaller number from the larger one

• Start adding the hundreds place

• Review regrouping

• Directly add the numbers

What does regrouping help you understand in an addition problem?

• How to subtract numbers

• How to multiply numbers

• How to divide numbers

• How to represent the same number in a different way

How many one dots are regrouped into one 10 stick?

• 20

• 15

• 10

• 5

What is the number represented by 10 one dots regrouped into one 10 stick and 4 remaining dots?

• 16

• 12

• 10

• 14

What is another way to regroup besides using 10 one dots into a 10 stick?

• Regrouping 10 sticks into 100 blocks

• Regrouping 5 sticks into 50 blocks

• Regrouping 20 sticks into 200 blocks

• Regrouping 15 sticks into 150 blocks

What is the number represented by regrouping 10 sticks into a 100 block and having 2 remaining 10 sticks?

• 120

• 130

• 110

• 100

When setting up the addition problem, where should the hundreds, tens, and ones be placed?

• In any order

• Hundreds in the tens place, tens in the ones place, ones in the hundreds place

• Tens in the hundreds place, ones in the tens place, hundreds in the ones place

• Hundreds in the hundreds place, tens in the tens place, ones in the ones place

What is the sum of 5 and 7 in the ones place?

• 13

• 12

• 11

• 10

What do you do when you get a sum of 12 in the ones place?

• Keep 12 in the ones place

• Ignore the carry over

• Carry over 1 to the tens place and keep 2 in the ones place

• Carry over 2 to the tens place and keep 1 in the ones place

What is the final answer to the addition problem 185 + 227?

• 412

• 410

• 400

• 420