G2; 3-digit subtraction regrouping Lesson.

subtraction with regrouping

How do you subtract when the numbers seem too big?

• The biggest number always goes on top.

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

412 - 99 =

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

• MORE ON THE FLOOR, GO NEXT DOOR

Subtracting Three-Digit Numbers

​Subtracting three digit numbers

​To subtract....

​Remember this helpful rhyme!

Multiple Choice

In what place should I start subtracting?

• hundreds

• tens

• ones

Multiple Choice

What question should you always ask when subtracting?

• Should I really do this?

• Can I subtract that?

• Does my Mom really love me?

• Will it rain today?