# 3-digit Numbers on an Abacus

We already know about hundreds, tens and ones. Now let us learn how to represent 3-digit numbers on an abacus.

We know, an abacus is a tool or a toy for counting. An abacus which has three rods.

We are learning three digit numbers on an abacus so, this abacus has three rods: the hundreds rod, the tens rod and the ones rod. Each rod can have a maximum of nine beads.

For Example:

1. Take the number 270

2 beads on hundreds rod and 7 beads on tens rod and 0 beads on ones rod

Thus, expanded form of 270 = 2 hundreds and 7 tens and 0 one.

The number can be written in words as: two hundred and seventy.

2. Take the number 422

4 beads on hundreds rod and 2 beads on tens rod and 2 beads on ones rod

Thus, expanded form of 422 = 4 hundreds and 2 tens and 2 ones.

The number can be written in words as: four hundred and twenty-two.

3. Take the number 531

5 beads on hundreds rod and 3 beads on tens rod and 1 bead on ones rod

Thus, expanded form of 531 = 5 hundreds and 3 tens and 1 one.

The number can be written in words as: five hundred and thirty-one.

4. Take the number 506.

5 beads on hundreds rod and 0 beads on tens rod and 6 beads on ones rod

Thus, expanded form of 506 = 5 hundreds and 0 tens and 6 ones.

The number can be written in words as: five hundred and six.