In this unit students will apply their understanding of the relationship between addition and subtraction to become fluent at solving addition and subtraction problems within 1000. They will also apply their understanding of the relationship between multiplication and division to become fluent in solving multiplication and division facts to 100. Before this, the students have only solved addition/subtraction and multiplication/division problems independently. In the final 4 lessons, students will use a letter to represent the unknown quantity in an equation.
Unit-at-a-glance
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Key concept: We can use the relationship between addition and subtraction to add and subtract within 1000. |
Key concept: We can use the relationship between multiplication and division to multiply and divide within 100. |
Key concept: We can represent unknown quantities in equations using letters. |
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| Suggested pacing |
Days 1-3 |
Days 4-6 |
Days 7-10 |
| Suggested class plan |
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Additional unit information
Prior Knowledge Needed:
- Exploring equal groups as a foundation for multiplication and division; Grade 3, Unit 1; 3.OA.C.7
- Developing strategies for addition and subtraction; Grade 3, Unit 3; 3.NBT.A.2
- Understanding the relationship between multiplication and division; Grade 3, Unit 7; 3.OA.C.7
- Investigating patterns in number and operations; Grade 3, Unit 8; 3.OA.D.8
Units on the Horizon:
- Using multiplication and division strategies with larger numbers. (Grade 4, Unit 3)
- Introducing measurement conversions (Grade 4, Unit 7)
- Solving problems using multiplicative comparison (Grade 4, Unit 8)