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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 __________

                  Step 1.   First  add the ones and regroup. Step 2.  Then add the tens.
                              3 + 7 = 10 ones = 1 ten 0 ones                      1 + 2 = 3 tens

                              Write 0 in the ones column and                      Write 3 in the tens column.

                              carry over 1 to the tens column.
                                                                                       t    O
                                    t    O                                             1

                                    1                                                  2    3
                                    2    3                                         +        7
                                +        7                                             3    0

                                         0

                  Thus, 23 + 7 = 30. So, Shikha has 30 crayons now.

                  example 1: Add 25 and 35.
                  Solution:

                  Step 1.  First add the ones and regroup.             Step 2.  Then add the tens.

                              5 + 5 = 10 ones = 1 ten 0 ones                       1 + 2 + 3 = 6 tens

                              Write 0 in the ones column and                       Write 6 in the tens column.
                              carry over 1 to the tens column.

                                                                                          t   O
                                     t   O                                                1

                                     1                                                    2    5
                                     2    5                                           +   3    5
                                 +   3    5                                               6    0
                                          0

                  Thus, 25 + 35 = 60

                  example 2:  Find the sum of:

                                  (a)  74 + 6.                              (b)  27 + 33.

                  Solution:       (a)      t    O           t   O           (b)       t    O          t    O

                                           1                1                         1               1
                                           7    4           7    4                    2    7          2    7
                                       +        6       +        6                +   3    3      +   3    3

                                                0           8    0                         0          6    0

                  Mathematics-2                                                                                          41

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