Abacus Lesson 22 // Addition -Complementary Numbers Respect to 10- ONE'S Column Video Lecture | Abacus Master Class:Become an Expert (English) - Personal Learning

complementary numbers with respect to
the number 10 in the ones column alright
so this is pretty simple
it's a baby step ahead and if you've
memorized your complementary numbers
this will be a piece of cake now let me
just point out these are symbol addition
problems and they would be a piece of
cake for you anyways I'm sure because
you're smart you know these things you
know how to add and all that but we're
just going through these simple problems
to get you so that you can do this with
the abacus it's a different way of
thinking but you know that by now so
let's start with the first problem 3
plus 9 so I put the number three on my
abacus and I'm going to add to that then
number nine now just like we did before
we when we add we subtract the
complement so I see 9 I think 1 so there
we go
I take away 1 and add 1 to the tens
column 3 plus 9 is a 1 and a 2 12 3 plus
9 is 12 let me just do that again in
case ok so there's 3 now to add 9 I
subtract the complement which is 1 and
add a bead in the tens column because
this is with respect to the number 10 3
plus 3 plus 9 is 12 a 1 and a 2
all right let's do the next problem 4
plus 7 so we put 4 in the ones column on
our couch on a calculator on our abacus
calculator too it's kind of insulting to
the advocacy you might think anyway so
number 4
sorry advocates don't get mad at me I
won't call you that again
4+7 here we go
I saw the number seven there and I I've
been practicing all my complementary
number of times I think well the paired
in the number seven is is three so I
take away three and add a bead in the
tens column four plus seven is a 1 and a
1 which is the number 11 4 plus 7 is 11
piece of cake
I can feel it I can see it in your that
the wheels are turning in your head and
you're gone yeah I think I might begin
this so this is I think I let's do
another one I'm getting kind of excited
now all right here you go 9 plus 9 well
the math was that yard probably already
knows what it is but let's go through
this with the kit with the abacus brain
so 9 plus 9 well the compliment to the
number 9 is the number 1 so I take away
1 2 and add 1 in the tens column 9 plus
9 is a 1 and an 8 18 9 plus 9 is 18
there we go piece of cake don't you look
that just feels good doesn't it it's
like wow I just the numbers just start
appearing when you use the complementary
numbers and you don't you have to like
think too much in your head like wow I
like this let's do another one 4 plus 6
put the number 4 on your calculator and
I'm going to add to that the number 6
well the number the compliment to the
number 6 is 4 well ok so I subtract 4
and add that bead in the tens column
well 4 plus 6 is 10
oh yeah 4 plus 6 is 10 and yeah the
complementary numbers so of course they
add up to 10 but that's how we do it
with the abacus brain all right another
one
four plus nine
well that's piece of cake we've done the
94 that means I take away one as the
complement to the number nine is one
take that slide one beat away add
another bead in the tens column four
plus nine is a 1 and a 3 which is 13 4
plus 9 is 13
all right there's fun let's do another
one at least two more I think you're
getting this I can just like somebody
put some grease on those wheels in your
head and it's starting to turn you're
going so here we go 9 plus 6 combining
some finger movements there there's the
number 9 and I am going to add to that
the number 6 6 6 6 6 6 oh yeah there's a
complementary number the compliment to
the number 6 is 4 so take that away and
add one there well there it is a 1 and a
5 1 and a 5 that's the number 15 so 9
plus 6 is 15 9 plus 6 is a 15 and 1 and
a 5 there we go all right we got to do
another one this is getting fun all
right let's do the number 8 plus 7 there
is the number 8 and we are going to add
to that the number 7 7 7 7 complement of
that is 3 you probably got that faster
than me because your wizard these so
that means ok so 8 plus 7 take away
those 3 beads there because the
compliments in number 3 add 1 in the
tens column or in the next column to the
left and there's our answer
will it's the same one a 1 and a 5 so 8
plus 7 is 15 a 1 and a 5 is 15 all right
I know I said only two more but this is
kind of fun
so let's do just one more just one more
let's do a 7 plus 9 7 plus 9
well compliment to the number nine is
one so I got take that away add one
there a one-in-six sixteen seven plus
nine is 16
you know I don't know about you but I
think I well they're pretty even but I
think I like the complimentary numbers
in with respect to ten more than the
complimentary numbers with respect to
five I don't know why maybe is because
earn more we get a play with a new
column and now they're pretty even that
would be unfair to see I like this more
than the other but this is pretty fun so
but I won't take all the fun on the
video I'll let you go and print off the
worksheet and work through some of the
problems on there and I'll have a little
bit more fun on you on your own with
those numbers and just go through it get
the feel of the abacus really grasp on
to these complimentary numbers with
respect to the number ten I love this
section here we're getting into the fun
stuff now on the advocates when you're
done with that and you feel like you
have a grasp on it we're going to take
one more baby step forward and do the
same thing complementary numbers with
respect to ten but we're going to be
using the tens column too
you