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               \ 03-Oct-2025  Bharat Arora   Proof-9                                    Reader’s Sign _______________________ Date __________






                       Practice time 3d


              Make 10 and add.

                      tens Ones                                          tens Ones
              1.               9                                2.                8
                   +           7                                      +           6
                        1      6

                      tens Ones                                          tens Ones
              3.               6                                4.                9
                   +           9                                      +           8



                      tens Ones                                          tens Ones

              5.               5                                6.                5
                   +           7                                      +           8





              VertiCAl Addition


              We know that



                                                  and             make

                                    7              +        3        =                  10
              To add 7 and 3, we can also arrange the numbers one below                         7
              the other and add as shown on the right.

              vertical addition is a mathematical operation where two or more

              numbers are added by writing them one below the other, with                   +   3
              the digits of the same place value aligned in columns.                            10
              Example: Add 6 and 8 vertically.

              Solution:  We write the numbers in columns and add using lines as shown here.

                               tens Ones
                                        6
                             +          8

                                 1      4
                                                                                                             Critical Thinking
              Note: Draw lines for the two numbers.                      Challenge Question

              Count all the lines together and write                 find two numbers that add up to 14, but
              the number as their sum.                               remember—neither of them can be 7.




              Mathematics-1                                                                                          45
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