Unit Goals: Priority: 2.NBT.B.8- Add or subtract within 1000, and justify solution 2.NBT.B.6- Demonstrate fluency with addition and subtraction within 100 Supporting: 2.NBT.B.9- Use the relationship between addition and subtraction to solve problems
Simpler Performance:
• Able to solve three digit problems using manipulatives and work mats. Students will most likely need extra modeling and questioning to get them to this performance. They may be able to explain what steps they are taking with questioning and modeling.
More Complex Performance:
• Able to solve three digit problems using the algorithm independently, and they are able to explain their solution by writing out the steps or checking their solution with the inverse operation.
• Able to apply knowledge of regrouping to solve problems like 900-199 and explain how they*…show more content…*

Today, I want to teach you another way or a shortcut (algorithm) to solve three-digit number subtraction problems. Guiding Question Description for Students of Expected

Today, I want to teach you another way or a shortcut (algorithm) to solve three-digit number subtraction problems. Guiding Question Description for Students of Expected

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