Why is 2 times 10 the same as 2 times 11?
Because 2 times 10 is twenty, and 2 times 11 is twenty too!
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More Math Dad Jokes
Why was six afraid of seven?
Because seven eight nine!
Parallel lines have so much in common...
It's a shame they'll never meet.
Why did the student do multiplication problems on the floor?
The teacher told him not to use tables!