Lesson plan

# 10. Use number representations to win a contest (A)

teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.1 http://corestandards.org/Math/Content/2/NBT/A/1
teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.1a http://corestandards.org/Math/Content/2/NBT/A/1/a
teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.1b http://corestandards.org/Math/Content/2/NBT/A/1/b
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Represent numbers in different but equivalent ways.

This lesson provides an opportunity for students to apply their knowledge and understanding of place value to a real-life situation. Students are asked to represent the number 548 multiple ways in order to win an online contest.

Key Concept students will use:

• We can represent three-digit numbers in different but equivalent ways.

Skills students will use:

• a bundle of ten tens can be thought of as a hundred
• the digits in a three-digit number represent hundreds, tens, and ones, from left to right
• understanding that ten ones make a ten (Grade 1, Unit 1)

Students engage in Mathematical Practice 8 (Look for and express regularity in repeated reasoning) as they discover patterns when representing a number in a variety of ways.

Key vocabulary:

• digit
• equivalent
• place value
• represent
• strategies
• three-digit

Special materials needed:

• base ten blocks if needed