Subtracting Numbers Within 100 With Regrouping

 
Here's another one:

75-28

Stack it and line things up in stripes:

75-28

Start with the ones...  See if you can do the subtraction:
 

Work for 75-28... Nope! We can't subtract 8 from 5, since 8 is bigger than 5!


Remember how to fix it?

We borrow (regroup) from the tens stripe.  I'm going to do it on the next page...  See if you can figure it out on your own before looking!  Split the 7 into a 6 and a 1...

Go to the next page for the rest!

 
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