To add numbers, you can line up the numbers vertically and then add the matching places together. This tutorial shows you how to add numbers vertically!
Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form. Compare two multi-digit numbers based on meanings of the digits in each place, using >, =, and < symbols to record the results of comparisons.
If you have a number in standard form, you can quickly change it into expanded form or even into words with a few steps! Watch this tutorial to learn the steps needed to change from one form to another.