Magic Numbers help students to see that 2-digit numbers can be broken apart many ways in tens and ones. This will help lay that foundation for when you start regrouping with your students. I will use this the first day of introducing regrouping and practice it every day leading up to subtraction with regrouping. This way they will understand that 53 is the same as 40 plus 13 making it easier to understand why we "borrow" or "take away" a group of ten. The fact that we aren't really changing the numbers, just rearranging it, or REGROUPING. Gotta love that magic word.
This is just one part of my Addition and Subtraction 2-Digit Regrouping Pack. If you enjoy this, then please purchase the entire pack. It is filled with lessons and activities for your students to enjoy practicing regrouping.
Thanks! - Mrs. Bathman
Magic Numbers for Regrouping
by Amanda Bathman
is licensed under a Creative Commons Attribution-NoDerivs 3.0 Unported License