Answer :

5x6=30
6x6=36

You would need 1 more 6
I can't explain this very well, sorry.
Well 5x6=30

you know that you need to add one more group of 6 in the equation 6x6 so you can simply add 6 to the product of 5x6 to get your answer

5x6=30

30+6=36!

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