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    example 1. Look at the image below and help the shopkeeper to find the actual weight
                of the watermelon.
                Solution. The weight on one side of the scale is

                                         2 kg + 5 kg =  7 kg
                Weight of the watermelon + 1 kg                                                      1 kg          2 kg

                               = Weight on the other side of the scale = 7 kg                                      5 kg
                Think of different denominations of weight.
                                          6 kg + 1 kg =  7 kg

                Hence, the weight of the watermelon = 7 kg – 1 kg = 6 kg.

                example 2. Find the weight of the pumpkin.

                Solution. Pumpkin + 500 g = 5 kg + 1 kg                                                            1 kg
                Pumpkin + 500 g = 5 kg + 1000 g (Since 1 kg = 1000 g)                                500 g         5 kg
                Pumpkin + 500 g = 5 kg + 500 g + 500 g
                Hence, the weight of the pumpkin is = 5 kg + 500 g = 5 kg 500 g.

                            Exercise 10C

                  Find the weight of the objects on the scale.

                    1.             1 kg          2 kg                     2.             2 kg          1 kg
                                                 5 kg                                                  5 kg

                    3.            1 kg           2 kg  5 kg               4.            5 kg           10 kg

                                  500 g          1 kg                                    500 g
                  5.                             2 kg                     6.                           1 kg

                    7.             1 kg          500 g                    8.             200 g         500 g
                                                 2 kg

                       166       Mathematics 3

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