Abacus Math

Abacus math is an instrument made up of sticks and beads.The sticks represent the place of number and beads are used for the numbers. 1st stick from the right is ones place or unit place and 2nd stick is for ten’s place. For 1st grade of Math we will discuss only two digit number.

How to write the numerals using abacus


In the above picture, there are two sticks. One from the right side is one place or unit place stick and the next is tens place stick.
Now there are,
two beads in ten’s stick = 20
No beads in one’s place stick = 0
So the number formed is 20.


In the above picture,
1 bead in ten’s stick = 10
3 beads in one’s place stick = 3
So the number is 13.
In this way we can write the numbers using abacus.

Writing A Number Names

Numbers
Number Names
Numbers
Number Names
Numbers
Number Names
1
One
11
Eleven
30
Thirty
2
Two
12
Twelve
40
Forty
3
Three
13
Thirteen
50
Fifty
4
Four
14
Fourteen
60
Sixty
5
Five
15
Fifteen
70
Seventy
6
Six
16
Sixteen
80
Eighty
7
Seven
17
Seventeen
90
Ninety
8
Eight
18
Eighteen
100
Hundred
9
Nine
19
Nineteen
10
Ten
20
Twenty

The child has to lean the spellings of these number names only and rest of the number names he/she can be write using the above number names.
Example 1 : 35
In 35, 3 is in tens place = 30
(Thirty)
And 5 is in ones place = 5
Five
Join these number names together , so
35 = Thirty Five

Example 2 : 48
In 48, 4 is in tens place = 40
(Forty)
And 8 is in ones place = 8
Eight
Join these number names together , so
48 = Forty Eight


Abacus Math

1st Grade Math

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