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    E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_02\Chap_02
                     \ 10-Nov-2025  Bharat Arora   Proof-8                                    Reader’s Sign _______________________ Date __________

                       4.  Write in columns and subtract. Check the subtraction.
                           a.  3204 – 1659                 b.  9596 – 6599                 c.  73648 – 8769

                           d.  69569 – 45999               e.  65003 – 58765               f.  56321 – 19546
                           g.  60000 – 14963               h.  87000 – 54698

                    EStiMAtiNg thE diFFERENCE

                    Similar to the estimated sum, we can also find the estimated difference. We round off
                    the numbers to estimate their difference.

                    Example. Find the estimated difference:
                                 a.  75 – 28 to the nearest 10                b.  342 – 168 to the nearest 100

                    Solution.  a.         T O                   T O           b.     H T O                     H T O
                                          7 5    rounded        8 0                   3 4 2     rounded        3 0 0

                                      –   2 8    rounded     –  3 0               –   1 6 8     rounded    –   2 0 0

                                          4 7                   5 0                   1  7 4                   1 0 0
                                              Actual            Estimated                    Actual                Estimated
                                          difference            difference                difference               difference

                                Exercise 2E

                        1.  Estimate  each  difference  by  rounding numbers  to the nearest 10. Also  find  the
                           actual difference.
                           a.  76 – 25              b.  436 – 255            c.  715 – 219             d.  555 – 333
                           e.  2634 – 1862          f.  8652 – 4327          g.  4253 – 3243           h.  8888 – 2222

                       2.  Estimate each difference by rounding numbers to the nearest 100. Also find the
                           actual difference.
                           a.  436 – 258            b.  736 – 192            c.  572 – 308             d.  733 – 264

                           e.  3732 – 2486          f.  5024 – 1456          g.  27426 – 11548         h.  5964 – 2736

                    SuBtRACtioN WoRd PRoBLEMS

                    Example. The population of a town is 74321. If 39876 are males, find the number of
                    females in that town.

                    Solution. Total population of the town =              7 4 3 2 1
                                Number of males                     = – 3 9 8 7 6

                                Number of females                   =    3 4 4 4 5
                    Thus, the town has 34445 females.

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                                                                                        Addition and Subtraction

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