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    E:\Working\Focus_Learning\Math_Genius_2_(09-10-2023)\Open_Files\Chap_02
                   \ 26-Feb-2024  Bharat Arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                           Practice Time 2e

                  1.  Add the following.

                        (a)      t   O           (b)      t    O         (c)       t   O          (d)       t   O

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

                        (e)      t   O           (f)      t    O         (g)       t   O          (h)       t   O

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

                  2.  Write in columns and add.

                       (a) 39 + 8              (b) 54 + 7                (c) 46 + 25             (d) 63 + 19
                                t    O                   t    O                   t    O                   t   O

                            +                        +                        +                       +

                  ADDING mOre ThAN TwO NumberS wITh reGrOuPING

                  Rani’s father refers an online shopping store app to Rani and
                  her sister. Rani shopped online and gained 4 points. Her sister
                  shopped at the same online store and gained 5 points. Their
                  father gained 6 referral points without shopping.

                  rani: How many points we have earned altogether?
                  Father: 4 + 5 + 6 = 15 points

                  rani: How do you add so quickly?                 Check if the
                  Father: We can add more than two                sum of any two           t    O

                  numbers in any order. Group the                 numbers is 10.                4
                  numbers for tens. We know that                                                5
                  4 and 6 make 10, so we can add them                                  +        6
                  together first. Then we add 5 to 10.                                     1    5

                  Thus, 4 + 5 + 6 = 4 + 6 + 5 = 10 + 5 = 15

                  44                                                                                     Mathematics-2

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