G2; 3-digit subtraction regrouping Lesson.

Subtraction with regrouping

I can subtract 3-digit numbers with a variety of strategies.

Subtracting Three-Digit Numbers

​Subtracting three digit numbers

• The biggest number always goes on top.

• Remember the greatest place value is where you will determine which number is biggest.

​Example:

412 - 299 =

• FIRST I SEE THAT I HAVE MORE ON THE FLOOR.

• MORE ON THE FLOOR, GO NEXT DOOR

Example:

​To subtract....

​Remember this helpful rhyme!

Multiple Choice

In what place should I start subtracting for this number?

567

• hundreds

• tens

• ones

Steps for Subtracting

• Begin in the ones place

• Ask "Can I Subtract?"

• Regroup if necessary

• Subtract

​How do I subtract
these numbers?

Multiple Choice

• 239

• 230

• 170

• 160

​How do I subtract
these numbers?

Multiple Choice

• 396

• 414

• 596

• 386

How do I subtract
these numbers?

Multiple Choice

• 279

• 269

• 331

• 278

Multiple Choice

On Monday, there were 634 cars in the parking lot. On Tuesday, there were 192 cars. How many more cars were there on Monday?

• 642

• 542

• 442

• 562

Multiple Choice

163-137

• 26

• 125

• 300

• 200

Multiple Choice

824-195

• 300

• 529

• 629

• 129

Multiple Choice

360-254

• 106

• 160

• 362

• 100