Addition Learning Module
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Addition Learning Module

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Digit Probabilities

Enter percentages for digits 0 through 9. They must total 100%.
For the leading digit of a multi-digit integer, 0 is excluded and the probabilities for 1-9 are automatically renormalized.
Column Test: This test contains five fixed tasks designed to bridge two-number addition and longer multi-integer addition. You will solve, in order: 60 one-digit numbers, 30 two-digit numbers, 20 three-digit numbers, 15 four-digit numbers, and 12 five-digit numbers. The numbers are arranged in screen-sized columns so that no scrolling is required during a task. If "Exclude carried column(s)" is selected, enter only the last digits of the answer equal to the digit length of that task.
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