We already find out about lots of, tens and ones. Now allow us to
discover ways to symbolize 3-digit numbers on an abacus.

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

We’re studying three digit numbers on an abacus so, this abacus has three rods: the lots of rod, the tens rod and those rod. Every rod can have a most of 9 beads.

For Instance:

1. Take the quantity 270

2 beads on lots of rod and seven beads on tens rod and 0 beads on ones rod

Thus, expanded type of 270 = 2 lots of and seven tens and 0 one.

The quantity may be written in phrases as: 200 and
seventy.

2. Take the quantity 422

4 beads on lots of rod and a pair of beads on tens rod and a pair of beads on ones rod

Thus, expanded type of 422 = 4 lots of and a pair of tens and a pair of ones.

The quantity may be written in phrases as: 4 hundred and twenty-two.

3. Take the quantity 531

5 beads on lots of rod and three beads on tens rod and 1 bead on ones rod

Thus, expanded type of 531 = 5 lots of and three tens and 1 one.

The quantity may be written in phrases as: 5 hundred and
thirty-one.

4. Take the quantity 506.

5 beads on lots of rod and 0 beads on tens rod and 6 beads on ones rod

Thus, expanded type of 506 = 5 lots of and 0 tens and 6
ones.

The quantity may be written in phrases as: 5 hundred and 6.

2nd Grade Math Observe

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