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Page 43 - Math Genius C2
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    E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_02
                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   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 carry over                       Write 3 in the tens column.

                  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.                       Challenge Question

                  example 1: Add 25 and 35.                                          Two 2-digit numbers add up to
                                                                                     98.  One  of  the  numbers  ends
                  Solution:                                                          with  4,  and  the  other  starts

                  Step 1.  First add the ones and regroup.                           with  6. What are the two

                  5 + 5 = 10 ones = 1 ten 0 ones                                     numbers?

                  Write 0 in the ones column and carry over                       Step 2.  Then add the tens.
                  1 to the tens column.                                            1 + 2 + 3 = 6 tens

                                                                                   Write 6 in the tens column.

                                     t   O
                                     1                                                    t   O

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

                                                                                          6    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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