Page 14 - SM Class 3 Inner.cdr

4-digit Numbers on Abacus

We know that an abacus is a tool with spikes, which
is used to represent numbers.

To show a four-digit number we need an abacus with four spikes. The first
spike four right represents ones, the second spike represent tens, the third
spike represent hundreds and the fourth spike represent, thousand.

Look at the abacus below :
Remember

If there is no beed on any spike,
than value of that spike is ‘O’.

Th H T O Th H T O Note
2 3 4 3 7 4 9 6
We must aware that 9999 is
Two Thousand three Seven Thousand four the last and greatest four-
hundred forty-three. hundred ninety-six digit number. So 10000 will
be first and smallest five digit
number. Therefore one more
spike will be added to the left
E xercise 2.2 of abacus to represent five-
c.
digit number.

1. Read the number on abacus and write number name in given space.

a. b.

Th H T O Th H T O Th H T O

2. Represent the given number on the abacus and write its number
name.

a. b. c.

Th H T O Th H T O Th H T O
9 2 1 9 3 0 7 5 5 2 4 8

14
Mathematics In Focus - 3