SumBells
The development of the users addition, subtraction and multiplication skills.
Craft are shown approaching the user, each craft having bearing numbers
and an operator. The user task is to left click on approaching craft
that carry a calculation that results in an odd number.
Initially the operator is addition and as the user succeeds it moves on
to subtraction and then multiplication. For each attribute initially
there will be few craft approaching slowly, as the user succeeds the
number of craft will increase as will the speed of approach.
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