Mental Math: Adding 10 or 100 using Base 10 Blocks

This video explains how to add 10 or 100 to a number in your head using mental visualization of base 10 blocks. The instructor reviews the structure of three-digit numbers and how each digit represents different values depending on its place in the number. Examples are given with base 10 block visualizations to show how adding 10 or 100 affects the digits in the number.