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Alien Subtraction
Aliens are coming to take over our planet. Each ship is labelled with a number. Don't let the aliens land by clicking the ship with the difference of the numbers shown before it lands.
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1. Read the given number sentence.
2. Find the difference between the given numbers.
3. Click the correct answer before the enemy lands in our territory.
Timed Subtraction - Find the difference between the numbers
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