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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 MASS

                    example 1. Add:

                                 a.  44 kg 278 g and 58 kg 783 g

                                 b.  270 g 875 mg and 186 g 68 mg

                    Solution.  Arrange the  given  measures  in  columns of appropriate  units  and  add

                    columnwise.

                                 a.        kg        g

                                                      1
                                           1     1  1
                                           4 4     2 7 8     44 kg 278 g + 58 kg 783 g = 103 kg 61 g

                                       +   5 8     7 8 3
                                         1 0 3     0 6 1

                                 b.         g       mg

                                                      1
                                                   1
                                          1
                                         2 7 0     8 7 5     270 g 875 mg + 186 g 68 mg = 456 g 943 mg
                                       + 1 8 6    0 6 8

                                         4 5 6     9 4 3

                    example 2. Subtract:
                                 a.  16 kg 783 g from 22 kg 370 g

                                 b.  486 g 865 mg from 600 g 20 mg

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

                                 a.        kg        g

                                          1 11    12 16 10
                                          2 2      3 7 0        22 kg 370 g – 16 kg 783 g = 5 kg 587 g
                                      – 1 6        7 8 3

                                            5      5 8 7

                                 b.         g         mg
                                          5 9 9      9 11 10

                                         6 0 0       0 2 0     600 g 20 mg – 486 g 865 mg = 113 g 155 mg
                                      – 4 8 6        8 6 5
                                           1 1 3     1 5 5

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