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    E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_09
                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________

                  ADDITION AND SUBTRACTION OF LENGTHS

                  Addition of Lengths

                  To add two or more lengths in metres or centimetres, we simply add the numbers

                  and write down the unit.
                  Example 1: Add the following.

                                 (a) 75 m + 18 m               (b) 86 cm + 57 cm            (c) 79 m + 26 m + 85 m

                  Solution:  (a)          1                    (b)     1 1                  (c)         2

                                          7 5 m                            8 6 cm                       7 9 m
                                      +   1 8 m                     +      5 7 cm                       2 6 m
                                          9 3 m                        1 4 3 cm                  +      8 5 m

                  Subtraction of Lengths                                                            1 9 0 m

                  To subtract the given lengths, we simply subtract the smaller length (number) from
                  the bigger length (number) and write down the unit.

                  Example 2: Subtract the following.

                                 (a) 81 m – 38 m               (b) 72 cm – 58 cm            (c) 163 cm – 95 cm
                  Solution:  (a)          7 11                 (b)     6 12                 (c)         15

                                          8 1 m                        7 2 cm                       0 5 13
                                      –   3 8 m                     –  5 8 cm                       1 6 3 cm

                                          4 3 m                        1 4 cm                    –      9 5 cm
                                                                                                        6 8 cm
                           Practice Time 9B

                  1.  Add the following.

                        (a)                      (b)                     (c)                      (d)

                                5 9 cm                       5 6 cm                   8 2 m                5 6 3 m
                             +  3 3 cm                       2 8 cm                   4 5 m             +  4 2 7 m

                                                      +      2 0 cm            +      1 1 m

                  2.  Subtract the following.

                        (a)                      (b)                     (c)                      (d)

                                7 3 cm                    8 7 cm                  4 9 5 m                  9 6 2 m
                             –  5 0 cm                –   6 8 cm               –  1 3 6 m               –  2 8 6 m

                  Mathematics-2                                                                                         157

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