Regrouping with tens (carrying to tens) — two-digit addition
This is a beginner lesson for adding two 2-digit numbers with regrouping (aka CARRYING) — meant for 2nd grade math.
I first show the process alongside a visual model of base ten blocks, and then we practice it without it.
Later in the lesson, I show a problem where the answer is more than 100, requiring three digits in the answer (but the addends are two-digit numbers).
We also solve a word problem involving addition of three numbers.
If you cannot see the video above, click here for an alternative video player.
See also
Math Mammoth Grade 2 curriculum