Agnessesay2008 Agnessesay2008
  • 11-10-2017
  • Mathematics
contestada

Explain how to find 40×50 using mental math

Respuesta :

zane14 zane14
  • 11-10-2017
Just do 4x5 then add the zeros
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theonlycoolone
theonlycoolone theonlycoolone
  • 11-10-2017
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
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