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Page 57 - Math Genius C2
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    E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_03
                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________

                  2.  Subtract the numbers on the number line.

                       (a)   22 – 16 = ________

                            0  1 2  3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

                       (b)   30 – 20 = ________

                            0  1 2  3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

                       (c)   19 – 0 = ________

                            0  1 2  3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

                       (d)  39 – 23 = ________

                            0  1 2  3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

                  ReGROUPING NUmBeRS FOR SUBTRACTION

                  Sometimes, there are not enough ones to subtract from. In such situations, we need

                  to regroup the tens into ones.

                                                             1 ten = 10 ones

                                                =                                                =
                         23 = 2 tens 3 ones = 1 ten 13 ones               36 = 3 tens 6 ones = 2 tens 16 ones

                  Some more examples:

                   (a)  35 = 3 tens + 5 ones                           (b)  60 = 6 tens + 0 ones
                            = 2 tens + 1 ten + 5 ones                           = 5 tens + 1 ten + 0 ones

                            = 2 tens + 10 ones + 5 ones                         = 5 tens + 10 ones + 0 ones

                            = 2 tens + 15 ones                                  = 5 tens + 10 ones

                          Think Tank                                          Critical Thinking
                        1.  When 1 ten is borrowed and added to 3 ones,                             Math Insight
                             there are _____ ones.                                             Regrouping of numbers
                        2.  When 1 ten is borrowed and added to 5 ones, there are              in subtraction is called
                             _____ ones.                                                       Borrowing.

                  Mathematics-2                                                                                          55

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