- See
Tetrys before you begin on this page. Follow
instructions from Tetrys for each decad.
- Then you will see an addition statement for two
numbers > 5 between the hands. The addens will be
represented of the hands with the thumbs
representing the number 5.
- The solution to the sum can easily be seen by
counting, starting after 10, by the number of the
extended fingers. Do not count thumbs.
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- For example, if the displayed sum is 7 + 8,
there will be 2 and 3 fingers extended respectively
equal 5.
- So counting by these fingers after 10 gives 15
as the solution.
- Clicking on the hands after the solution is
revealed displays other sums that equal 15.
- See Video Below.
- Multiplication
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