Subtraction with Regrouping Concepts

Miss Turner demonstrates how to subtract three-digit numbers with regrouping using base 10 blocks. She sets up the problem 321 minus 147, showing how to compose the number using hundreds, tens, and ones. The lesson covers regrouping from tens to ones and from hundreds to tens to facilitate subtraction. The process is verified using the standard algorithm, ensuring students understand both the manipulative and algorithmic approaches.

What is the main topic of Miss Turner's lesson?

• Adding three-digit numbers

• Subtracting three-digit numbers with regrouping

• Multiplying two-digit numbers

• Dividing four-digit numbers

What tools does Miss Turner use to demonstrate subtraction?

• Number lines

• Abacus

• Base 10 blocks

• Fraction strips

What is the first step in setting up the problem 321 minus 147?

• Subtract the hundreds

• Compose the number 321 using base 10 blocks

• Add the numbers together

• Multiply the numbers

How many hundreds are used to represent the number 321?

• One hundred

• Four hundreds

• Two hundreds

• Three hundreds

Why can't Miss Turner subtract 7 from 1 in the ones place?

• Because subtraction is not possible

• Because they are in different places

• Because 1 is larger than 7

• Because 7 is larger than 1

What does Miss Turner do to solve the issue in the ones place?

• Uses a calculator

• Adds more ones

• Regroups from the tens place

• Substitutes with a different number

After regrouping, how many ones does Miss Turner have?

• Five ones

• Seven ones

• Ten ones

• Eleven ones

What is the next step after subtracting the ones?

• Multiply the tens

• Add the tens

• Subtract the hundreds

• Subtract the tens

Why does Miss Turner need to regroup in the tens place?

• Because she has enough tens

• Because she cannot take 4 from 2

• Because she wants to add more tens

• Because subtraction is complete

How many tens are created after regrouping from the hundreds?

• Seven tens

• Five tens

• Ten tens

• Twelve tens