Unit 7: Adding and Subtracting within 1,000

Students use place value understanding, the relationship between addition and subtraction, and properties of operations to add and subtract within 1,000.

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Concept

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Practice

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Set 1

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Set 2

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Advanced

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What this unit covers

A Add and Subtract within 1,000, without Composition or Decomposition · 5 lessons

Goals

• Add and subtract numbers within 1,000, without composition or decomposition, and use strategies based on the relationship between addition and subtraction and the properties of operations.

Lessons

1. Compare, Count On, and Count Back
2. Add and Subtract with Tens and Hundreds
3. Count On or Count Back to Subtract
4. Add and Subtract 3-Digit Numbers in Different Ways
5. Center Day 1 (Optional)

B Add within 1,000, Using Place-Value Strategies · 6 lessons

Goals

• Add numbers within 1,000, using strategies based on place-value understanding, including composing a ten or a hundred.

Lessons

1. Use a Ten to Add within 1,000
2. Compose a Greater Unit
3. Compose Tens and Hundreds to Add
4. Add 3-Digit Numbers
5. Add within 1,000
6. Center Day 2 (Optional)

C Subtract within 1,000, Using Place-Value Strategies · 8 lessons

Goals

• Subtract numbers within 1,000 using strategies based on place value understanding, including decomposing a ten or hundred.

Lessons

1. Decompose to Subtract
2. Decompose Tens or Hundreds
3. Think Before You Subtract
4. Decompose a Ten and a Hundred to Subtract
5. Subtract within 1,000
6. Does It Make Sense? (Optional)
7. Center Day 3 (Optional)
8. Book Drive (Optional)