3.NBT.3 – Fluently add and subtract within 1000 using strategies and algorithms based on place value.

4.NBT.5 – Multiply a whole number of up to four digits by a one digit whole number, and multiply two two digit numbers, using strategies based on place value and the properties of operations.

****The following pictures and video were done by the artist Adam Hillman (his store). I have full permission from him to use these pictures and video as a lesson. Go see his art! It's super cool! And some of his pics are very mathy!*****