Page 96 - Start Up Mathematics_5

1 Remember
We can write as 0.001 in decimal form and read
1000
it as zero point zero zero one. 1 = 0.1 (one-tenth)
10
125 19 1
Similarly, = 0.125, = 0.019, and so on. = 0.01 (one-hundredth)
1000 1000 100
1
1000 = 0.001 (one-thousandth)

Place Value of Decimal Numbers

There are two parts in a decimal number. The part before the decimal point is called the
whole number or integral part and the part after the decimal point is called the decimal or
fractional part. As we keep moving to the right, the numbers get ten times smaller.
Look at the place value chart of decimal numbers.

Ten Tenths Hundredths Thousandths
Thousands Thousands Hundreds Tens Ones . 1 1 1
(10)
(1)
(1,000)
(100)
(10,000) (Th) (H) (T) (O) 10 100 1000
(TTh) (t) (h) (th)
62.54 6 2 . 5 4

231.753 2 3 1 . 7 5 3

whole number part decimal part

In the number 62.54,
Place value of 6 is 6 tens, i.e., 60

Place value of 2 is 2 ones, i.e., 2 A Challenge!

5
Place value of 5 is 5 tenths, i.e., Write the place value of 9
10 in 17.04293.
4
Place value of 4 is 4 hundredths, i.e.,
100
In the number 231.753,

Place value of 2 is 2 hundreds, i.e., 200
Place value of 3 is 3 tens, i.e., 30

Place value of 1 is 1 one, i.e., 1
7
Place value of 7 is 7 tenths, i.e.,
10
5
Place value of 5 is 5 hundredths, i.e.,
100
3
Place value of 3 is 3 thousandths, i.e.,
1000

88