Page 81 - Maths Class 05
P. 81

3.  Arrange the following in ascending order.

                     4
                                                                                            9
                                                         7
                             ,
                                                                                                   ,
                 a.    ,  4    4   ,  4             b.    ,   7   ,  7   ,  7   ,  7       c.    ,  2  6   ,  5
                     5    2    10   3                   12 10      8   9    15             12 12 12 12

                     1    2    5    3                    3    8    5   1                    2    5    7    3
                 d.     ,     ,     ,               e.     ,     ,     ,               f.      ,     ,     ,
                     8    8    8    8                   14 14 14 14                        12 12 12 12
            4.  Arrange the following in descending order.

                                                                                            4
                     3
                                                         1
                                                                                                   ,
                             ,
                 a.    ,  2    5   ,  7   ,  11     b.    ,   1   ,  1   ,  1          c.    ,   4    4   ,  4

                     15 15 15 15 15                      2    6    4   3                    5   15 20 10

                     9
                                                         3
                                                                ,
                             ,
                 d.    ,  9    9   ,  9   ,  9       e.    ,  10   4   ,  7            f.   9    ,  4   ,  3   ,  5  ,  1
                     12 20 15 14 11                     12 12 12 12                        17 17 17 17 17
            Addition of Like Fractions
            As we know,
                                                                    Sum of numerators
                                    Sum of like fractions  =
                                                                  Common denominator

                                    3         6
            Example     :  Add       and
                                   17         17

                                  3         6
            Solution     :  As       and       are like fractions. So, sum of these fractions
                                 17        17


                             =    3   +   6
                                 17      17


                                 (3+6)       9               9
                             =
                                          =         Thus,       is the answer.
                                   17       17              17
                                               2                            3
            Example     :  Mohit walked      of a km and jogged      of a km. How far did he go ?
                                               8                            8
                             2      3
            Solution      :      +       ?
                             8      8

                                  2        3
                           As      and      are like fractions. So, sum of these fractions
                                  8        8


                                  2      3
                             =       +
                                  8      8


                                  (2+3)       5                         5
                                           =    .  Thus, Mohit went      km.
                             =
                                    8         8                         8



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