# Let's Stretch the Values! Writing Two-Digit Numbers in Expanded Form

What does it mean to expand a number? Use this lesson plan to help your students understand how to write the expanded form of two-digit numbers.
##### View aligned standards

Let’s stretch the values! Young mathematicians learn about writing two-digit numbers in expanded form in this helpful math lesson plan. Designed for first graders, this lesson introduces learners to place value by breaking down two-digit numbers into tens and ones (e.g., the number 25 can be understood as 20 and 5). Children will review terms such as single-digit numbers, value, and expanded form, and then practice writing two-digit numbers on charts and in number sentences to help them visualize the different values.

#### Learning Objectives

• Students will be able to identify the digit in the ones and tens places of a two-digit number.
• Students will be able to construct a number when told the digits in the tens place and ones place.
• Students will be able to write a two-digit number in expanded form.

#### Introduction

(5 minutes)
• Remind students what they already know about single-digit numbers, or the numbers 0 through 9.
• Tell students that today they are going to learn about two-digit numbers and their values.
• Remind students that value means how much a number is worth. Tell your students that they can show value using counters, manipulatives, and base ten blocks.
• Explain to your students that they will learn about place value, or the value of the location of a digit in a number.