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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 __________

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                          Activity                                                             Century   #Experiential Learning
                                                                                               Skills

                                                 Fun with addition and subtraction
                   Take any 4-digit number.                                          Example: 6249
                   Mix up the digits at random.                                                 2496

                   Subtract the smaller number from the greater number.                         6249  – 2496 = 3753
                   Add the digits of the difference.                                            3 + 7 + 5 + 3 = 18
                   If you get a two-digit number, add those.                                    1 + 8 = 9

                   Try this with some other 4-digit numbers. What do you get?

                            Exercise 2G

                    1.  Solve the following:

                        a.  617 + 358 – 234                                 b.  5243 + 3648 – 1764

                        c.  2436 – 3645 + 7231                              d.  4360 – 864 + 1355
                        e.  8436 – 2436 – 1543                              f.  9750 – 2480 – 975

                        g.  9000 – 4500 – 3245                              h.  5000 + 476 – 2136
                    2.  Find the number which is
                        a.  272 more than 7364                              b.  1545 more than 20978

                        c.  784 less than 3695                              d.  2543 less than 93650
                    3.  What should be added to

                        a.  2785 to get 5000?                               b.  736 to get 5640?
                        c.  4537 to get 97364?                              d.  5346 to get 10000?

                    4.  What should be subtracted from
                        a.  93643 to get 2714?                              b.  50000 to get 3772?

                        c.  65348 to get 9999?                              d.  9736 to get 4761?
                  5.  The capacity  of Eden Gardens stadium is 65507. If  during a cricket  match,  15,942
                        people entered before noon and 14940 after noon, how many more people can enter

                        the stadium till it is filled to capacity?
                  6.  On Sunday, 10250 men, women and children visited the Book Fair. There were 4275
                        men, 3549 women and the rest were children. Find the number of children who visited
                        the Book  Fair.

                       38        Mathematics 4

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