MathKeys Software "Unlocking Whole Numbers, Vol. 11(Addition of Two and Three Digit Numbers)"

Third graders explore the addition of two and three digit numbers. After a class demonstration of adding 640 and 280 with base-ten blocks, they play a game on the computer, in pairs, with a goal to end up with a sum as close to 400 as possible.

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Resource Type
Lesson Plans
Instructional Strategy
Skills Practice
Ed Software

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