Adding 10 Depthcharger

Practise adding 10 to any 2-digit number.

(Ages 6 and up)

The evil genius Dr Trumpenfurter has created an army of evil robots which he plans to use to take over the world. Your job is to destroy the robot submarines using depthcharges. The only problem is your sonar screen is always off by 10 fathoms, so you have to add ten to the number shown.

Best of luck brave hero!

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