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| Image courtesy of http://rationalmathed.blogspot.com/2007/09/looking-further-at-multiplication.html |
Videos - Multiplication Method
Week 4 Blog Post
I
really liked the videos (Lattice Method, Russian Peasant Method, and Cool Multiplication Technique) for the different multiplication methods. In the first
lattice method video it was really nice to see the breakdown and how he
explains to set up the lattice. When he incorporated the decimal that seemed
like a great way for students to learn where to place decimals at the
beginning. I feel that we expect kids to know right off the bat that oh you
just count over and how many spots the decimal was originally over. I have seen
many a blank stares. But if you would start it with the lattice method and
begin explaining how it works and see how it is two over and two over, that’s
there it ended up in your final answer. I just think there may be a few more Ah
Ha moments in the classroom with this technique.
The
second video the Russian Peasant Method was really interesting. I liked that
with this method not only were you working with multiplication of a problem but
also working on halving and doubling numbers. I feel that this would help
students practice halving and doubling numbers without it being a practice as
if we were drilling students with cards. This method is a nice way for student
to check or even perform the multiplication problem. I feel that some students
may like this way better, specially if they do not know their multiplication
facts well. The halving and doubling may be the hardest part, but than you get
to the bottom and all you have to do is add to get your answer.
I
know when I was a student all we had was the standard algorithm and no other
way. I remember we wrote our numbers for our multiplication facts on the back
of the paper for the answers, than we cut them out and drilled until we knew
our facts. Also, those dreaded times test, do you remember those? When it came
to the bigger multiplication of two, three and four plus digit numbers, we
relied on the standard algorithm and the hope that you remembered those facts
that you drilled over and over. I know I myself would have been better off
using different methods to find answers to the problems. It was sad to watch
students who figured out other ways to answer the problem and not get the
points because it wasn't the standard way. It is refreshing to know that
teachers are working with students and helping them understand the process
through multiple techniques.
The
last video was good for a laugh. I’m sure there are many kids out there that
wish they could just compute a question to get an answer, I know I've had my
moments.
Here
are a few other multiplication methods I found on You Tube check them out, they
may come in handy some day. The last one reminded me of my first post and
different methods that were used for place value in different cultures.
Gelosia
Method of Multiplication - Lattice Method
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