Khan Academy Addition and Subtraction with Regrouping

Please use the links from Khan Academy below to practice and further understand the math skills we have been working on in class.  I would recommend watching one link per night since there is a lot information to review. Enjoy and have fun being a flexible mathematician, as you continue to think about different strategies and visualizing numbers in many different ways.

Breaking apart 3-digit addition problems

Adding and subtracting on number line

Worked example: Subtracting 3-digit numbers (regrouping)

Missing number for 3-digit addition within 1000