Alexa can help you learn your subtraction facts. You can review the flash cards and then test your knowledge. At any point you can say "Alexa, review mode" to switch to review or say "Alexa, test mode" to start a test. You can say "Alexa, next" to move to the next card. At any point during the test, you can say "Alexa, what's my score" to get your current test score.
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