Lesson Crack 2-digit multiplications super fast in mind
Algebra
->
Decimal-numbers
-> Lesson Crack 2-digit multiplications super fast in mind
Log On
Algebra: Decimal numbers, power of 10, rounding
Section
Solvers
Solvers
Lessons
Lessons
Answers archive
Answers
Source code of 'Crack 2-digit multiplications super fast in mind'
This Lesson (Crack 2-digit multiplications super fast in mind)
was created by by
Alex.33(110)
:
View Source
,
Show
About Alex.33
:
Alex is back.
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.
