Question

Explain how to find 40×50 using mental math

Answer 1

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 :)

Answer 2

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