Page 13 - ICSE Math 2

We use any three digits from 0 to 9 to write a 3-digit number. These digits are
written under H (Hundreds), T (Tens) and O (Ones). For example,

H T O

1 3 9 = 1 hundred + 3 tens + 9 ones

On an abacus, 139 is shown as:

H T O
Rod H reads in hundreds.

Rod T reads in tens.

Rod O reads in ones.

We cannot write 0 at the hundreds place as it will then become a 2-digit number.

Number Names

We already know how to write number name of numbers from 1 to 99.

Recall

Write the number name of the following numbers.

(a) 8 __________________________
(b) 34 __________________________

(c) 96 __________________________

(d) 72 __________________________

To write the number name of a We form a 3-digit number.
3-digit number, we always write

the hundreds place first, then the
tens and ones places together.
Look at the given examples.

(a) 139 is written as one hundred thirty-nine.

(b) 180 is written as one hundred eighty.

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