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    E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_04
                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________

                           Practice Time 4e

                  1.  Subtract the following.

                          (a)    H    t    O     (b)      H    t    O    (c)       H    t    O    (d)       H    t    O

                                 8    5    6              6    9    0              3    4    3              6    7    9
                             –   6    3    4          –   4    9    0          –   2    3    3          –   4    7    5

                  2.  Write the numbers in columns and then subtract.

                       (a) 537 – 105           (b) 753 – 20              (c) 234 – 4             (d) 814 – 14

                                 H    t    O              H    t    O              H    t    O              H    t    O

                             –                        –                        –                        –

                  suBtrAction of 3-digit numBers with regrouping

                  regrouping Tens

                  We have learnt how to subtract by regrouping tens into ones for 2-digit numbers.

                  Let us use this to subtract 3-digit numbers.

                  Example 1: Subtract 246 from 793.

                  Solution:  First write the numbers in columns according to their place value and

                                  then subtract.

                  Step 1.  Subtract the ones.                                     Step 2. Subtract the tens.

                  Since 3 < 6, regroup.                                           8 tens were left.
                    9 tens + 3 ones = 8 tens + 13 ones                            So, 8 – 4 = 4 tens.

                  Now, 13 – 6 = 7 ones.
                                                                                            H    t    O

                                       H    t    O                                               8   13
                                            8    13                                         7    9    3

                                       7    9    3                                      –   2    4    6
                                   –   2    4    6                                               4    7
                                                 7

                  78                                                                                    Mathematics-2

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