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In class activity - Amaze your students!
Directions for your students:
1. Write down 2 whole numbers less than 10 (less
than 20 if you can handle it!)
2. Add the first and second number, write the sum as the third number.
3. Now add the third and second, write it down for your fouth.
4. Keep doing that until you have ten numbers in your list.
5. Now add up all ten numbers.
I can tell you your sum before you even add all of them, just by looking at your
list!
How?
Figure out how I do it!
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