Read, write, & compare multi-digit numbers using symbols including expanded form. Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two ...

Use Base-Ten diagrams and standard, expanded, and word forms to represent numbers. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Find Which One ...

Almost 30 years ago, a group of Kaktovik students invented a numbering system that reflected the way they counted in Iñupiaq and made math more intuitive for them. Soon, anyone in the world will be ...