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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 __________

                  example: Add 36 and 18.

                  Solution: Arrange the numbers one below the other according to the place values
                               of the digits. Then add.
                  Step 1.  Add the ones and regroup.                             Step 2. Add the tens.

                  6 + 8 = 14 ones = 1 ten 4 ones                                   1 + 3 + 1 = 5 tens

                  Write 4 in the ones column and carry over                        Write 5 in the tens column.
                  1 to the tens column.

                                                                                         t    O

                            t    O                                                       1

                            1                                                            3    6
                            3    6                                                   +   1    8
                        +   1    8                                                       5    4

                                 4

                  Thus, 36 + 18 = 54.

                          Get it right!
                                                          t    O                                  Be Aware

                               t    O                     1                                 Don’t miss regrouping the
                               5    9                     5    9                            ones into tens and ones
                           +   3    6                 +   3    6                            when there are more than
                                                                                            9 ones.
                               8    15   7                9    5    3

                          Think Tank                                                                            Critical Thinking
                        In the following addition tree, each number is the sum of the two numbers just below
                        it. Find the missing number for each blank.
                        1.                              2.                               3.
                                       21

                                          12                        9                                      12

                                2      7      5                  5      4      2                  3      8      4

                  Mathematics-2                                                                                          43

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