What do you notice? What do you wonder? #ANNMath #howmany #noticewonder

@MathSarahLL Working with a student. She noticed matching heights along the diagonal. From there, she totaled each of the sets of columns with matching heights, then totaled those totals. We are wondering if you built this with 391 tiles?

@MathSarahLL Notice: Multiples in horizontal rows: 1,2,3,4,... & 2,4,6,8,... & 3,6,9,12,... The red stacks have 1,4,9,... tiles. Wonder: What is the yellow sequence next to the red? Same on both sides? How does this relate to multiplication? The sum of all products in an nxn table?