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                   \ 11-Sep-2024  Bharat arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                  subtrACtion in tens

                  Example 1: Subtract 20 from 30.

                  Solution: When we subtract 2 tens from 3 tens, we are left with 1 ten as shown below.

                                                                                                              tens Ones

                                                                                                                3      0
                                                 –                                 =
                                                                                                            –   2      0

                                                                                                                1      0

                             3 tens              –             2 tens              =       1 ten

                  Thus, 30 – 20 = 10.

                  Example 2: Find 40 – 10.

                  Solution: When we take away 1 ten from 4 tens, we are left with 3 tens.

                                                                                                              tens Ones

                                                                                                                4      0

                                                                                                            –   1      0

                                                                                                                3      0

                           4 tens            –            1 ten            =          3 tens

                  Thus, 40 – 10 = 30.

                           Practice time 7e

                  Subtract the tens.
                  1.       tens Ones         2.     tens Ones       3.      tens Ones         4.      tens Ones

                             7     0                  5     0                 4     0                   7      0

                        –    6     0             –    3     0            –    2     0               –   4      0

                  5.       tens Ones         6.     tens Ones       7.      tens Ones         8.      tens Ones

                             6     0                  8     0                 4     0                   9      0

                        –    5     0             –    1     0            –    3     0               –   7      0

                  Mathematics-1                                                                                         109

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