Thursday, January 14, 2016

Two Digit Subtracting


We have been learning about two digit subtraction.  We are just in the beginning phases, so we are using pictures to help us.  Here are the steps:



1.  Draw a picture of the total or larger number.  Use tens and ones.  Decide if you can subtract.  Can you take 6 ones away from 2 ones?  If you can, go to step four.  If you can't, go to step two. 





2.  Break a ten into 10 ones and add it to the ones.    We say, "Get more ones, from the tens!"




3.  Make you number representation match the new picture. 




4.  Subtract the ones.





5.  Subtract the tens.  Go back and check your work.

No comments:

Post a Comment