Abacus Lesson 32 // SUBTRACT- COMPOUND Complementary Numbers Respect to 10- TEN'S Column Video Lecture | Abacus Master Class:Become an Expert (English) - Personal Learning

alright looks like you're back for
another round
this is lesson 32 subtraction using
compound complementary numbers in the
tens column so here we go let's just
jump right into it because you're so
excited to do this you probably don't
want to waste any time and I've already
talked too much
73 minus 18 so set the number 73 on your
abacus
there is the number 73 and we are going
to subtract from that the number 18 we
started over here and the first thing we
do is take away one in the tens column
that is an that is the digit one in the
number 18 and now we need to take away
eight in the ones column hmm okay so
it's just like we did before
a triggers the number three okay so here
we go boom-boom-boom all right 73 minus
18 is 55
did you give what we did there do you
remember that process that the
complement to the number eight is two
but since there is a five or a heavenly
bead involved we have to think of 2 with
respect to five which is a number three
so we add that three get rid of the 5
and then take one away in the tens
column so we are left with 55 let's do
it 83 minus 26 83 minus 26 all right we
start over here take the way to that
parts done all right we need to take
away 6 from this and the process is Bing
Bing Bing and what are we left with a
five and a seven 83 minus 26 is 57
I can handle that let's do another one
72 there's the number 72 on our abacus
and we're going to subtract from that 16
72 and minus 16 alright first we start
over here take away one in the tens
column that's the one of the 16 and now
we need to take away 6 in the ones
column all right so here's what the
process is bang bang bang all right did
you get that process and what are we
left with of five and a six 56 so 72
minus 16 is 56
all right piece of cake let's do another
one let's do 23 minus 18 23 minus 18
started over here in the tens column and
I take away 1 now I need to subtract 8
here all right I know what to do I go
Bing Bing Bing there it is
23 minus 18 is 5 all right I can handle
that you love how these numbers just
start magically appearing well it's not
magic it's pretty calculated but it's
awesome yeah anyway all right 91 - 26 a
9 and a 1 oops 91 - 26 all right so let
26 26 that means there's a 2 in the tens
column so I'm going to subtract that
first and a 6 in this column hmm
I know I'm working with a 1 here because
I'm used to that and I go Bing Bing Bing
all right
91 minus 26 is a 6 and a 565 there it is
all right one more here we go let's do
74 -
twenty eight seven and a four -
twenty-eight alright so the first thing
I need to do is take away two there and
now I need to take away eight in this
column all right yeah Cobo 8 is 2 let's
try 5 is 3 so I take away 3 slide down
that 5 and OH
what do I do oh yeah I can handle this
Oh about got me there I just oh there it
is there it is whew I thought what about
got me
46 so 74 minus 28 is 46 all right even
though most of the problems are going to
be focusing on just this one principle
don't forget the stuff that you learned
in previous lessons like me I almost
forgot how to do that there but there's
a piece of cake because I've done it 100
times before in the previous lessons but
here too okay
so we can handle this remember when you
start doing any number everything is
that you've learned up to this point is
going to come into play so don't forget
those things and in fact the best thing
that you can do right now is to practice
this principle but to just do random
numbers just make up numbers in your
head start putting them on paper atom
and subtract them because that is the
best way to learn everything that you've
learned up to this point so this
worksheet it's good for learning this
principle but at this point the abacus
master the abacus master that you are an
are becoming needs to practice
everything and the best way to do that
is just to make up your own problems and
just do whatever you numbers come to
your mind and add them together but
that'll get you used to practicing
everything that you've learned up to
this point
you