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    E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_02
                 \ 12-Sep-2024               Surender Prajapati   Proof-4                     Reader’s Sign _______________________ Date __________

                           practice time 2d

                  1.  Add the following.

                       (a)    th H      t    O          (b)     th H     t    O          (c)     th H      t   O

                               3    4   3    5                  4    6   7    9                  2    6    1   6
                            + 2     5   5    9               + 3     2   8    7               + 3     5    4   8

                       (d)    th H      t    O          (e)     th H     t    O          (f)     th H      t   O

                               2    4   7    5                  2    0   4    8                  5    7    8   3
                               3    5   6    2                  1    8   5    9                       1    4   7
                            + 2     1   0    3               + 3     2   2    0               +       9    0   3

                  2.  Arrange in columns and find the sum of the following.

                       (a)  890 + 619                   (b)  7613 + 1387                 (c)  6401 + 3299

                       (d)  7395 + 1608                 (e)  4373 + 1023 + 532            (f)  2020 + 3030 + 460

                       (g)  4576 + 2748 + 1652          (h)  3221 + 1995+ 4236            (i)  6879 + 456 + 999

                  ChECking Addition

                  When we add the numbers of any column, once from the top and once from the bottom,

                  we observe that the answer will remain the same.

                  Let us add 1253 and 2442, once from the top and once from the bottom.

                  First, add the numbers downwards.              Now, check your answer by adding upwards.

                      th H      t   O                            Check:        3   6    9   5
                       1   2    5   3                                         th H      t   O

                   + 2     4    4   2    Down                                  1   2    5   3    Up
                                                                           + 2     4    4   2
                       3   6    9   5
                                                                               3   6    9   5

                  40                                                                                    Mathematics-3

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