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    E:\Working\Focus_Learning\Math_Genius_1_(05-10-2023)\Open_Files\05_Chap_5\Chap_5
                   \ 11-Sep-2024  Bharat arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                  Numbers iN teNs                                        aBaCus                                    spikes

                  For a 2-digit number, we need an abacus                               Left           Right
                  with two spikes.                                                            t    O

                  The spike on the left is for tens place.                                 Tens    Ones

                  The spike on the right is for ones place.                               Place Place
                  Count, learn and write.

                                                                                               tens Ones

                                                                                         10 =    1      0

                                                                    t    O              10

                       1 branch of 10 leaves                     1 ten = 10             Ten

                                                                                               tens Ones

                                                                                         20 =    2      0

                                                                    t    O              20
                  2 branches of 10 leaves each                  2 tens = 20             Twenty

                                                                                               tens Ones

                                                                                         30 =    3      0

                                                                    t    O              30

                  3 branches of 10 leaves each                  3 tens = 30             Thirty

                                                                                               tens Ones

                                                                                         40 =    4      0

                                                                    t    O              40

                  4 branches of 10 leaves each                  4 tens = 40             Forty

                                                                                               tens Ones

                                                                                         50 =    5      0

                                                                    t     O             50

                  5 branches of 10 leaves each                  5 tens = 50             Fifty

                  72                                                                                     Mathematics-1

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