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3 votes
Explain how to find 40×50 using mental math

2 Answers

5 votes
think about 40 over 50 and a line separating the answer from the problem like this:

40
x 50
---------
200 0*0=0 5*4= 20 so just put the zero back on the answer and you get 200.

the answer goes under the dotted line
User Willthefirst
by
8.2k points
7 votes
Just do 4x5 then add the zeros
User MathCatsAnd
by
7.8k points

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