Write base ten three-digit numbers in unit form; show the value of each digit

In this lesson, students work with base ten numerals representing modeled numbers with place-value cards, also known as Hide Zero cards, that reveal or hide the value of each place. They represent three-digit numbers as number bonds and gain fluency in expressing numbers in unit form (e.g., 3 hundreds 4 tens 3 ones), in word form, and on the place value-chart.