Seudónimo
Seudónimo
08-09-2016
Mathematics
contestada
estimate. Then record the product. 640×3=
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isaacgaitonde
isaacgaitonde
08-09-2016
you could estimate by doing 600x3=1800
(becasuse of the 0's in 600 it is easier to do 6*3=18 and then add two 0's to the end 1800)
then you simply multiple 640x3=1920
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