Page 11 - Start Up Mathematics_1

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) as shown. For example,

H T O Remember

1 3 9 = 1 hundred + 3 tens + 9 ones We cannot write 0 at the
hundreds place as it will
1 0 6 = 1 hundred + 0 tens + 6 ones then become a 2-digit
number.
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.

Number Names

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

Recall

Write the number names.

(a) 8 ______________________ (b) 34 ______________________

(c) 96 ______________________ (d) 72 ______________________

To write the number name of a
3-digit number, we always write the We form a 3-digit number
hundreds place first, then the tens
and ones places together. Look at

the given examples.

139 is written as one hundred thirty-nine

180 is written as one hundred eighty

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