Lesson Crack 2-digit multiplications super fast in mind

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This Lesson (Crack 2-digit multiplications super fast in mind) was created by by Alex.33(110) About Me : View Source, Show
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We now have 12- the number months of a year and 27-your side cash income, in dollars per month
to multiply. We do not have paper or pen at the time? How are we doing that?
Legendary technique incoming!
12*27
begin
1*2=2
1*7+2*2=11
2*7=14
have this diagram in your mind
2(1)1(1)4

2+1=3
1+1=2
and thus
324
Now take out your calculator to prove it!
If it's right, go show it off with your friends.

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