Page 94 - Maths Class 05
P. 94

5                    Decimals








            A  decimal  number  can  be  defined  as  a  number  whose  whole  number  part  and  the
            fractional part is separated by a decimal point. The dot in a decimal number is called a
            decimal point.

            The digits following the decimal point show a value smaller than one. Here’s an example of
            a decimal number 17.48, in which 17 is the whole number, while 48 is the decimal part.


            Whole number part                   Decimal part
                                     17 . 48

                                 Decimal point









                            17 Whole                         4 out of 10                      8 out of 100
            Pictorial Form of Decimal                         4 tenths                       8 hundredths



                                                                                              This whole is divided
                                          Let us consider
                                                                                              into ten equal parts
                                          this rectangle as a
                                                                                              and each part is
                                          whole or a unit.
                                                                                              called tenths   .





                                          The shaded portion is called 2 tenths and is denoted by 0.2.




                        0.2

            Look at the figures.











            It has 3 whole parts and two tenths and is denoted as 3.2.



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