Explain how to find 40×50 using mental math

Mathematics

2 answers:

lara [203]3 years ago

5 0

Just do 4x5 then add the zeros

umka21 [38]3 years ago

3 0

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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