Abacus Lesson 4 //Simple Addition (#'s 0-5 only) TEN'S column // Step by Step // Tutorial Video Lecture | Abacus Master Class:Become an Expert (English) - Personal Learning

So, this is simple addition using "earthly beads" and now
we're going to take it up a notch
and use the tens column
remember right here, this was the ones column
and now we're going to be using
the tens column
the tens column means we're going to be using
numbers like ten
twenty
thirty one and fifty five, sixty six
seventy three
all the way up to ninety-nine
It involves numbers
that are in the ones and the tens
column.
So, let's do a few problems-
so you can get used to it
let's say we have the number to eleven
one
and a one
right there's the number 11
and we're going to do 11 + 2
well 2 is in the ONES column
11 + 2
Is a 1 and a 3. And we read that thirteen.
So, 11 + 2
Eleven
plus two
is thirteen
ok, let's do another one.
how about
twelve
plus two
well
here's the number 12. And if I add the number 2...I just simply slide up 2 beads
on the ONES column.
12 + 2
is fourteen. A one
and a four is the number fourteen
Alright, let's do a big number. Let's make this
fun..let's get up there in the big numbers....
forty one
here you go, forty one, that's a big
number
forty one plus
three
that means i have to add three to ones
column.
What number is that?
A four and a four is?
the number
forty four
so 41 + 3 = 44
Clear the abacus...
Let's do a hard one...
here we go
Let's see if you can do this one.
We'll do two numbers that are both from the TENS column.
twenty-one
Let's add twenty-one and twenty-two
so twenty two is really easy to add to
this all i have to do is slide up two
beads in each- both the TENS column and
the ONES column.
so twenty one plus twenty two is what?
there's a four
and the three
twenty-one
plus twenty two is forty three.
Let's do another one like that.
31 + 11
alright, let's see if we can do this...
31. Put that on our abacus...
and to add we're going to...
we're going to slide beads up... for the
number eleven
that's easy- that means we slide up one
bead in each column
so 31 + 11 is...
42
Alright, so let's do one more and see if I can trick you.
let's do
fourteen plus ten
so let's put the number 14 on the board. How do we write the number
fourteen?
Well, we write the number 14 with a 1 and a 4.
So, we do it exactly the same on our abacus.
There's a 1.
And, there's a 4. There's the number 14.
Now, let's add 10 to that.
Now, how do we write a 10? We write a 1 and a 0.
So if we're going to add in a 1 and a 0....
the only bead that's going to move is this one right here, because a zero
nothing changes right here!
a one and a zero is a 10.
so fourteen
plus ten
is twenty-four.
That's a pretty basic concept to grasp
and I think you can get that.
But, go ahead and take a little bit more
practice
even if you're comfortable with this type of addition
go through the worksheet and just work
through the problem so you get used to
moving the beads on the abacus.
So you get used to reading it. So you get used to seeing it and seeing how the numbers interact and
and how we add on the abacus.