Lesson 10

The purpose of this lesson is for students to write numbers to represent different base-ten representations including base-ten diagrams, _____ tens _____ ones, and expressions that show the value of the tens and ones digits.

In previous lessons, students read two-digit numbers and interpreted and created representations of those numbers. In this lesson, students write two-digit numbers to match different base-ten representations. Students also learn a new center that provides practice counting and writing numbers up to 99.

• Put each gameboard in a sheet protector.

Reflect on how you can reinforce number writing outside of math class. When can you ask students to write two-digit numbers that represent quantities around them? What questions can you ask to help them see the tens and ones in these quantities?