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Title: The best way to make multiplication simple
Description: In this note you will find a Japaness way can help you or your children to multiple 2 numbers without calculator and when i said 2 numbers i mean like 45x98, 107x47,or something like this

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Here​ ​is​ ​an​ ​interesting​ ​method​ ​to​ ​visualize​ ​multiplication​ ​that​ ​reduces​ ​it​ ​to​ ​simple​ ​counting!
Draw​ ​sets​ ​of​ ​parallel​ ​lines​ ​representing​ ​each​ ​digit​ ​of​ ​the​ ​first​ ​number​ ​to​ ​be​ ​multiplied​ ​(the
multiplicand,​ ​see​ ​figs
...

Draw​ ​sets​ ​of​ ​parallels,​ ​perpendicular​ ​to​ ​the​ ​first​ ​sets​ ​of​ ​parallels,​ ​corresponding​ ​to​ ​each​ ​digit
of​ ​the​ ​second​ ​number​ ​(the​ ​multiplier)
...

On​ ​the​ ​left​ ​corner,​ ​put​ ​a​ ​curved​ ​line​ ​through​ ​the​ ​wide​ ​spot​ ​with​ ​no​ ​points
...

Count​ ​the​ ​points​ ​in​ ​the​ ​right​ ​corner
...

Count​ ​the​ ​ones​ ​in​ ​the​ ​left​ ​corner
...
​ ​2)
...

Write​ ​all​ ​those​ ​numbers​ ​down​ ​in​ ​that​ ​order​ ​and​ ​you​ ​will​ ​have​ ​your​ ​answer​ ​(see​ ​products​ ​in
figs
...


This​ ​visual​ ​method​ ​is​ ​very​ ​valuable​ ​to​ ​teach​ ​the​ ​basis​ ​of​ ​multiplication​ ​to​ ​children
...

The​ ​Math​ ​Behind​ ​the​ ​Fact:​ ​The​ ​Distributivity​ ​of​ ​Multiplication
The​ ​method​ ​works​ ​because​ ​the​ ​number​ ​of​ ​parallel​ ​lines​ ​are​ ​like​ ​decimal​ ​placeholders​ ​and
the​ ​number​ ​of​ ​dots​ ​at​ ​each​ ​intersection​ ​is​ ​a​ ​product​ ​of​ ​the​ ​number​ ​of​ ​lines
...
​ ​Thus​ ​in​ ​the
example​ ​shown​ ​in​ ​fig
...
​ ​The​ ​method​ ​can​ ​be​ ​generalized​ ​to
products​ ​of​ ​3-digit​ ​numbers​ ​(or​ ​even​ ​more)​ ​using​ ​more​ ​sets​ ​of​ ​parallel​ ​lines
...



Title: The best way to make multiplication simple
Description: In this note you will find a Japaness way can help you or your children to multiple 2 numbers without calculator and when i said 2 numbers i mean like 45x98, 107x47,or something like this