A. Triangle Sums 1 
- What do you notice about the numbers in this triangle?
- Find the missing numbers in these triangles.
A. Triangle Sums 1
Lesson 1
Getting to Know Room 204
Est. Class Sessions: 2Daily Practice and Problems
Teacher Notes
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TIMS Bit
- These puzzles require both logical thinking and knowledge of addition and subtraction facts. Have students work in pairs to see that the numbers in the circles, when added together, result in the number on the line that connects them. Have students describe how they discovered the connection between the numbers.
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