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                     \ 10-Nov-2025  Bharat Arora   Proof-8                                    Reader’s Sign _______________________ Date __________

                                 b.  7 kg 245 g = 7 kg + 245 g = (7 × 1000) g + 245 g = 7000 g + 245 g = 7245 g
                                 c.  72 kg 750 g = 72 kg + 750 g = (72 × 1000) g + 750 g
                                                                     = 72000 g + 750 g = 72750 g

                    example 2. Convert the following into milligrams.
                                 a.  4 g                       b.  25 g 250 mg
                    Solution.  a.  4 g

                                     We know that 1 g = 1000 mg.
                                     4 g  = (4 × 1000) mg = 4000 mg
                                 b.  25 g 250 mg = 25 g + 250 mg = (25 × 1000) mg + 250 mg

                                                                        = 25000 mg + 250 mg = 25250 mg
                    example 3. Convert:

                                 a.  8 kg into g               b.  9 kg 648 g into g          c.  4 g 30 mg into mg
                    Solution.  a.  8 kg = (8 × 1000) g = 8000 g
                                 b.  9 kg 648 g = 9 kg + 648 g = (9 × 1000) g + 648 g = 9000 g + 648 g = 9648 g
                                 c.  4 g 30 mg  = 4 g + 30 mg = (4 × 1000) mg + 30 mg
                                                                   = 4000 mg + 30 mg = 4030 mg

                                Exercise 9D

                        1.  Convert the following into g.

                           a.  9 kg                 b.  26 kg                c.  215 kg                d.  320 kg

                           e.  8 kg 232 g           f.  18 kg 20 g           g.  19 kg 6 g             h.  55 kg 350 g

                       2.  Convert the following into mg.

                           a.  8 g                  b.  45 g                 c.  750 g                 d.  945 g

                           e.  8 g 370 mg           f.  15 g 13 mg           g.  150 g 9 mg            h.  14 g 203 mg

                       3.  Convert the following into g.

                           a.  9 kg 1 hg                                     b.  20 kg 4 hg

                       4.  The mass of Anu’s cat is 5 kg and Leena’s cat is 3 kg 250 g.
                           Express the mass of both cats in grams.

                    Conversion of Smaller units of Mass into Bigger units

                    To convert a smaller unit  into  a bigger  unit,  we divide.  To convert milligrams  into
                    grams, we divide the number of milligrams by 1000.

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