Page 20 - Revised Maths Wisdom Class - 3

18 MATHS

4-Digit Numbers on Abacus

A 4-digit number '1000' is represented on abacus as given:

In ones place there is no bead which represents 0 ones.

In tens place also there is no bead that represents 0 tens.

In hundreds place also there is no bead that represents 0 Th H T O

hundreds. 1 0 0 0

In thousands place there is only one bead that represents 1 thousand.

Similarly, 3245 is represented on abacus as given:
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In ones place there are fi ve beads that represent 5 ones.

In tens place there are four beads that represent 4 tens.

In hundreds place there are two beads that represent 2 Th H T O

hundreds. 3 2 4 5

In thousands place there are three beads that represent 3 thousands.

Exercise 2B

1 Write the number shown by each abacus.

(a) (b) (c)

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

2 Draw the beads on each abacus to represent the given number.

(a) (b) (c)

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

6 4 3 2 2 0 9 3 8 3 7 5