Perfect Practice Makes Perfect
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Doubling and Halving

MASTER multiplying and dividing by 2, 4, 5, 25 and 50 MENTALLY.

There are three levels of difficulty: beginner, intermediate and advanced.

Select “Set Up” to choose the desired topic and level.

Problems will be randomly generated until you correctly answer 20 problems. Your time and number of misses are recorded.

Keep trying until you can do a set perfectly (no misses) in under 60 seconds. That’s mastery!