Choose Activity

Activity
The goals of this activity are to choose your workout level, improve your multiplication speed, and advance to the next level. Try to get an answer for each box in the table. Once you feel comfortable you can try using the clock. Too difficult, try an easier level. Too easy, try a harder level. Record your times. Do you get faster each time you practice?

Special thanks to the Physics Education Technology PhET Team

Arithmetic Workout
Not satisfied with the level for your multiplication workout. Select a new level in the menu.  <flash>file=Arithmetic_rjk.swf

Add your results to the data table below

Correct	Incorrect	Time (seconds)	Code name (only numbers)
9	1	42	1348

Reflection

When you have filled in all the squares, check out the diagonal   line of numbers that runs from the × to the lower right corner of grid. Do you notice any patterns? Hopefully you noticed that the same numbers occur on each side of the diagonal. Think about why this happens and talk to your mates about it.

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