3-Digit Subtraction with Regrouping Techniques

Mrs. Schneider teaches three-digit subtraction with regrouping. She explains the process using a problem where 628 cookies are reduced by 394. The lesson covers subtracting from the ones, tens, and hundreds places, emphasizing when to regroup. The video concludes with tips on checking if more is on the top or floor and the importance of understanding regrouping.

What is the first step in solving a three-digit subtraction problem?

• Start with the hundreds place

• Start with the ones place

• Start with the tens place

• Borrow from the next column immediately

If you have more on top in the ones place, what should you do?

• Immediately borrow from the tens

• Subtract without borrowing

• None of the above

• Skip the ones place

What do you do if you don't have enough in the tens place to subtract?

• Guess the answer

• Stop the subtraction

• Borrow from the hundreds place

• Just skip the subtraction

After borrowing from the hundreds place, what does 100 become in terms of tens?

• 10 tens

• 20 tens

• 5 tens

• 15 tens

How many tens are left after subtracting 9 from 12 tens?

• 2 tens

• 3 tens

• 4 tens

• 5 tens

What signifies that you need to borrow in subtraction?

• None of the above

• More on the floor

• More on the top

• Equal numbers

What is the purpose of crossing out numbers during regrouping?

• To make the problem look harder

• To show a change in value due to borrowing

• To indicate subtraction has been done

• To confuse students

How many hundreds are left after subtracting 3 from 5?

• None

• 1 hundred

• 3 hundreds

• 2 hundreds

What is the final answer to Mrs. Schneider's cookie problem?

• 235 cookies

• 236 cookies

• 234 cookies

• 233 cookies

Why is it important to check each column during subtraction?

• To ensure accuracy

• To make it faster

• To avoid borrowing

• To use more paper