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    D:\Working\TouchPad_Maths\TouchPad_Maths_1\Open_Files\Chap_03\Chap_03
                   \ 17-Nov-2025     Surender Singh Rothan   Proof-7                           Reader’s Sign _______________________ Date __________

                      2.   use number combinations to find the missing numbers.

                           a. 4 +       = 9                 b. 7 +      = 8                 c.       + 0 = 9

                           d.       + 2 = 9                 e.  5 +      = 8                f.       + 1 = 8

                           g.       + 4 = 8                 h.  3 + 5 =                     i.   2 + 4 =

                    VertiCAl Addition

                    To add numbers vertically, we put one number under the other. This type of

                    addition is called vertical addition.
                                                                                                 Draw as many lines
                    Let us add 5 and 4.                                                         as each number and

                                                                                                count them together.
                                                                            5

                                                                        +   4
                                                                            9

                    Thus, 5 + 4 = 9.
                    Some more examples:

                      a.              3 | | |                            b.             8 | | | | | | | |
                              +       6 | | | | | |                            +        9 | | | | | | | | |

                                      9                                             1   7

                                Exercise 3F

                      1.  Add the following:

                                                              4                                                      6

                           a.                            +    5             b.                              +        7

                                                              2                                                      8

                           c.                            +    6             d.                              +        6

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                                                                                             Addition up to 20

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