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    E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_09\Chap_09
                 \ 10-Nov-2025  Bharat Arora   Proof-8                                     Reader’s Sign _______________________ Date __________

                AddITIon And SuBTrACTIon oF LengTh

                example 1. Add:
                             a.  20 m 76 cm and 8 m 35 cm                          b.  8 km 975 m and 6 km 687 m

                Solution.  Arrange the given measures in the appropriate columns and then add

                columnwise.
                             a.       m     cm

                                       1    1
                                    2 0     7 6       20 m 76 cm + 8 m 35 cm = 29 m 11 cm

                                   +   8    3 5

                                     2 9    1 1

                             b.      km      m

                                       1    1
                                               1
                                       8   9 7 5      8 km 975 m + 6 km 687 m = 15 km 662 m
                                   +   6   6 8 7

                                     1 5   6 6 2

                example 2. Subtract:
                             a.  9 m 76 cm from 16 m 25 cm

                             b.  16 km 245 m from 20 km 120 m

                Solution.  Arrange the  given  measures  in  columns  correctly  and  then  subtract

                columnwise.
                             a.       m      cm

                                       15    11 15
                                     1 6     2 5       16 m 25 cm – 9 m 76 cm = 6 m 49 cm

                                  –    9     7 6
                                       6     4 9

                             b.      km        m

                                     1    9  10 11 10
                                     2 0     1 2 0     20 km 120 m – 16 km 245 m = 3 km 875 m
                                  – 1 6      2 4 5
                                       3     8 7 5

                       154       Mathematics 4

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