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    E:\Working\Focus_Learning\Math_Genius_2_(09-10-2023)\Open_Files\Chap_04
                   \ 17-Nov-2023  Bharat Arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                  Addition of 3-digit numBers with regrouping

                  Nobita: There is a charity event in our

                  school for flood-affected people. I have
                  collected 265 clothes including shirts

                  and trousers from my area.

                  Shizuka: I have also collected

                  398 dresses from my area.

                  doraemon: You both

                  collected 663 number of

                  clothes.

                  Nobita: How do you calculate it Doraemon?

                  doraemon: To know the total number of clothes, we need to add 265 and 398. We

                  can do this step by step as shown here.

                  Step 1.  Add the ones and regroup.                                              H    t    O

                             5 + 8 = 13 ones                                                           1
                                                                                                  2    6    5
                                    = 1 ten + 3 ones                                          +   3    9    8

                               So, write 3 at the ones column and carry over 1                              3
                             to the tens column.

                  Step 2.   Add the tens and regroup.                  Step 3.  Add the hundreds.

                             1 + 6 + 9 = 16 tens                                   1 + 2 + 3 = 6 hundreds
                                         = 1 hundred + 6 tens                        So, write 6 at the hundreds

                               Now, write 6 at the tens column                     column.

                             and carry over 1 to the hundreds                          H    t    O
                             column.                                                   1    1
                                       H     t   O                                     2    6    5

                                        1    1                                     +   3    9    8
                                        2    6    5                                    6    6    3
                                    +   3    9    8

                                             6    3

                  Thus, 265 + 398 = 663

                  Mathematics-2                                                                                          73

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