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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 WEIGHTS

                  Addition of Weights

                  To add two or more weights in grams or kilograms, we simply add the numbers and
                  write the unit.
                  Example 1: Add the following.

                                 (a) 47 g + 39 g               (b) 58 kg + 76 kg            (c) 359 g + 268 g

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

                                          4 7 g                            5 8 kg                   3 5 9 g
                                      +   3 9 g                     +      7 6 kg                +  2 6 8 g
                                          8 6 g                        1 3 4 kg                     6 2 7 g
                  Subtraction of Weights

                  To subtract given weights, we simply subtract the smaller weight (number) from
                  the bigger weight (number) and write the unit.

                  Example 2: Subtract the following.

                                 (a) 85 g – 38 g               (b) 72 kg – 39 kg            (c) 820 g – 580 g
                  Solution:  (a)          7 15                 (b)     6 12                 (c)     7 12

                                          8 5 g                        7 2 kg                       8 2 0 g
                                      –   3 8 g                     –  3 9 kg                    –  5 8 0 g

                                          4 7 g                        3 3 kg                       2 4 0 g

                           Practice Time 9D

                  1.  Add the following.

                        (a)                      (b)                     (c)                      (d)      kg       g

                                4 6 kg                    3 0 0 g                 1 0 5 kg
                             +  3 4 kg                +   2 0 0 g              +      9 5 kg               2    3 2 7
                                                                                                        +  3    4 8 3

                  2.  Subtract the following.

                        (a)                      (b)                     (c)                      (d)      kg       g

                                3 4 0 g                   6 2 4 g                 1 3 5 kg
                             –  2 0 0 g               –   3 1 5 g              –      4 8 kg               7    7 1 8
                                                                                                        –  4    3 1 9

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