Abacus Lesson 21 // Intro. to Complementary Numbers with Respect to 10 Video Lecture | Abacus Master Class:Become an Expert (English) - Personal Learning

now in this lesson we're going to start
a whole new chapter a whole new section
of information that you can use all the
skills that you've used in the past to
grasp and understand this starting now
we are going to learn and use
complementary numbers with respect to
the number 10 now on most the last I
don't know 10 or so lessons that we've
been learning you've heard me say with
respect to the number 5 and when it
comes to numbers that add up to 5 there
are two pairs the 3 and the 2 and the 4
and the 1 well now and I'm just guessing
but I'm willing to go out on a limb here
and say that as you've started playing
around with the abacus and moving beads
around that you started to say to
yourself well well I don't quite get out
of if I have if I do this number how to
out of the beads work well this is going
to answer some of your questions and
we're going to get there so in this
lesson all we're going to do is practice
memorizing the pairs of numbers that add
up to the number 10 so here they are
first of all is the 9 and the 1 now as I
as I lay these out I don't want you to
try and memorize them add them together
well I do want you to memorize them you
just you don't have to add them together
so you just always keep in your mind the
pair 9 and 1 if I say 9 you say 1 if I
say 1 you say 9 well go through that in
your mind I'm not going to be hanging
out with you saying 9 or 1 all day long
but anyways that's the pair that you
memorize a 9 and a 1 the second pair is
the 8 and the 2 if I say to you say 8 if
I say a you say - that's the pair
they're always together if you have to
add the number 2 you know the number
that you're going to work with is 8
and that's how it works the third pair
is the number seven and the number three
both of those together add up to the
number ten and that's why they're paired
together
I say seven you think three I say three
you think seven match those together
just pair them inseparably in your mind
the fourth set of numbers is the number
six and the number four if I say four
you think sic six you not to get sick if
I say six you think for those are always
together and the last is probably pretty
obvious the number five and the number
five pretty simple so 9 + 1 8 + 2 7 + 3
6 & 4 & 5 & 5 those are the
complementary numbers with respect to
the number 10 those are all the numbers
that exist well real numbers those are
all the numbers whole numbers I guess
that add up to the number 10 9 + 1 8 + 2
7 + 3 6 & 4 5 & 5 or 5 & 5 4 + 6 3 & 7 2
& 8 1 & 9 so in this lesson really all
he wanted to do before we go on before
we do anything else in the abacus I mean
5 that wasn't - that wasn't too hard
that was a piece of cake he only had to
memorize 2 pairs well with the this next
step you really need to just memorize
these pairs always have them together in
your mind and depending on where you're
at this may be difficult or it may be
hard but just what what I'm going to
suggest that you do is make yourself
some little flashcards on one side put
the number 9 on the other side put the
number 1 and then the next pair on one
side put the number 8 on the other side
put the number 2 do the same thing with
7 & 3 6 & 4 & 5 & 5 and just kind of
shuffle them around in your hands and
just let me see the number 1 see if you
can say out loud or just
thinking in your mind the compliment to
that number so if you see the number one
without turning the card over you should
just think 9 I know this is a piece of
cake and I know that's easy but this
process of think always when you see one
of the pair's
to always look to the compliment of that
number and always have those evenly
matched in your mind the one in the 9
the 2 and the 8 3 and the 7 the 4 and
the 6 and the 5 and the 5 those pairs
will always be together and anytime
you're adding if you can just think the
compliment and I know I've said this
I've probably repeated myself about five
times now but that's the next step to do
is just to memorize these pairs so
that's it for this lesson I'll have a
little worksheet prepared for you that
can print out them with the squares
already laid out you can make your own
but this is just right the complimentary
numbers on them and just work through
them get used to matching these pairs
together when you feel like you've got a
good grasp on the complementary numbers
come back and watch the next lesson and
we'll start going through the ones
column with respect to the number 10
just like we've done before simple
problems and I think you'll get it and
you'll get it very quick and one more
thing before we go on to the next lesson
here the reason this is so important is
you're kind of breaking some alternate
methods of thinking out of your mind
when it comes to addition and
subtraction because this is really a
different way of thinking and if you can
get this working with the abacus is
going to you'll really be able to keep
up with or maybe excel at it would be
ahead of someone who's using the
calculator because you're really
mechanizing the process of addition and
subtraction mechanizing means we're
making it it's just like a machine by
the simple fact that you're when you see
the number one you think the number nine
you're not adding you're not subtracting
you're not counting with anything you're
just just that simple process
is what's going to make it the whole
process of the abacus become mechanized
like it's doing the calculating for you
as long as you have those memorized it
makes it so easy so yeah that's why I'm
pointing those out to you and just
memorize those and we'll be ready for
the next lesson