Name: ______Date: ______

Concept: Worksheet (1) Grade: Four / Section: “A, B”

Concept: Worksheet (1) Mathematics Grade : Three / Section: “A, B”

Chapter :Decimal Numbers Lesson : Reading and writing decimal numbers

What is Decimal? Introduction: A decimal number is a number that has a decimal point.

A decimal point is a period that separates a decimal number into two parts. The number before the decimal point is called the whole part and the number

after the decimal point is called the decimal part.

 For example, in the number 532.19:

532 is the whole part and 19 is the decimal part.

Place Value: The place before the decimal point is expressed as Ones, Tens, Hundreds, Thousands, and so on (from right to left on the left side of decimal point) and the place after the decimal point (from left to right after the decimal point) are expressed as Tenths, Hundredths, Thousandths, and so on.

For example: the number 45.783 has:

5 ones, 4 tens, 7 tenths, 8 hundredths and 3 thousandths.

Reading a Decimal Number:

While reading a decimal number, the digits on the left of the decimal point are read as whole number and the digits on the right of the decimal point are

read as individual digits.

For example:

71.82 is read as seventy-one and eighty-two hundredths.

Note:

Some decimals are smaller than one. These decimals start with a zero to show that there is nothing before the decimal point. For example: 0.28, 0.154.

Let's take a look at some examples:

 What does the decimal number 532.19 mean? Let us write the decimal number 532.19 in the place value table.

This number is read as "Five hundred thirty two and nineteen hundredths"

 What does the decimal number 0.24 mean? This number is read as "twenty four hundredths"

Exercise 1 : Write each decimal in word form:

a) 51.98 : ______

b) 7.009 : ______

c) 0.02 : ______

d) 0.027 : ______

e) 200.002 : ______

f) 20.20 : ______

Exercise 2 : Write the following values in standard form:

a) One and forty-two hundredths: ______

b) Sixteen thousandths: ______

c) Fifty-nine and seven thousandths: ______

d) Nine hundreds and nine hundredths: ______

e) Eight thousandths: ______

f) One hundred thirteen thousandths: ______

Answer key:

Exercise 1 : Write each decimal in word form:

g) 51.98 : fifty-one and ninety-eight hundredths.

h) 7.009 : seven and nine thousandths.

i) 0.02 : two hundredths.

j) 0.027 : twenty-seven thousandths.

k) 200.002 : two hundred and two thousandths.

l) 20.2 : twenty and two tenths.

Exercise 2 : Write the following values in standard form:

g) One and forty-two hundredths: 1.42

h) Sixteen thousandths: 0.016

i) Fifty-nine and seven thousandths: 59.007

j) Nine hundreds and nine hundredths: 900.09

k) Eight tenths: 0.8

l) One hundred thirteen thousandths: 0.113