Understanding Place Value with Tens and Ones

MatholiaChannel

This educational math video introduces the concept of place value for numbers up to 20 using the base-10 block method. Through three clear examples—the numbers 12, 16, and 20—the video demonstrates how to decompose two-digit numbers into groups of "tens" and "ones." Visual aids include counting blocks that are highlighted as they are counted, a place value chart, and written equations that connect the physical quantity to the abstract numerical symbol. The core theme is the structure of the base-10 number system. It emphasizes that the digit in the tens place represents a group of ten items, not just the number one. The video systematically breaks down the process: identifying the group of ten, counting the remaining single units, recording these distinct values in a T-chart, and finally writing a summary equation (e.g., "12 = 1 ten 2 ones"). For educators, this resource is a foundational tool for teaching early numeracy and number sense. It provides a bridge between concrete manipulatives (blocks) and abstract representation (written numbers). It is particularly useful for introducing teen numbers, clarifying the often-confusing concept of zero as a placeholder (as seen in the number 20), and modeling mathematical language for describing quantity.