Classes Practice in Subtraction

Subtraction Drill
1st: Enter a minuend and a subtrahend of your choice.
1st: Press the "minuend" button then "subtrahend" buttons.
a variation of the above.
3rd: Mentally compute the difference.
4th: Press the "difference" button to see the correct answer.
- =
  -         =
5th: Repeat as desired.

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