Explain how to find 40×50 using mental math

asked Apr 3, 2018 32.7k views

3 votes

by Ruchi

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7 votes

Using mental math you can look at this a do 4 times 5 = 20 then, add the two zeros back in.. and your answer is 2000 :)

Arnabkaycee answered Apr 5, 2018

7.9k points

1 vote

4*5 is 20
add 2 zeroes to the end because of the two you took out from 40 and 50
40*50=2000

Okoman answered Apr 7, 2018

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