# 10. Compare three-digit numbers using tickets (A)

teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.4 http://corestandards.org/Math/Content/2/NBT/A/4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Apply ability to compare three-digit numbers in solving a real-life problem.

This lesson provides an opportunity for students to apply their knowledge and understanding of comparing three-digit numbers to a real-life situation. Students are asked to figure out how many tickets each student has, given the digits and relationship between each number.

Key Concept students will use:

• Because 100 is greater than any quantity that can be represented by a two-digit number, we compare three-digit numbers by looking at the hundreds place first.

Skills students will use:

• Read and write numbers to 1000 using standard form, word form, and expanded form
• Compare two three-digit numbers based on the meaning of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they apply their knowledge of the value of the hundreds place to determine and compare the number of tickets each person has.

Key vocabulary:

• compare
• equal/equivalence
• expanded notation
• greater
• hundreds
• less
• ones
• tens
• value

Special materials needed:

• base ten blocks (for students who need extra support)
• place value mat
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