directed numbers operations guess
- Author:
- Arthur Lee
- Topic:
- Numbers
Drag a and b along the number line.
Can you estimate the positions of , , and ?
Show points to see four marked positions. Can you tell which operation gives each one?
Check to see the answers.
Try again with other positions of a and b.
Is there always enough information for you to estimate?
Would this be useful for classroom discussion?
What other questions will you ask (as a teacher / learner)?