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    SubtrACtIon oF 4-dIgIt nuMbErS

                    We have learnt subtraction of 3-digit numbers without and with regrouping. The same
                    method is applied when we subtract 4-digit numbers.

                    Subtraction without regrouping

                    Example 1. Subtract 5634 from 7947.

                    Solution. Write the numbers in columns and subtract them.

                    Step 1.  Subtract the ones. 7 – 4 = 3 ones
                                                                                                          Th H      T O
                    Step 2.  Subtract the tens. 4 – 3 = 1 ten
                                                                                                           7    9   4    7
                    Step 3.  Subtract the hundreds. 9 – 6 = 3 hundreds
                                                                                                       –   5    6   3    4
                    Step 4.  Subtract the thousands. 7 – 5 = 2 thousands
                                                                                                           2    3   1    3
                    So, 7947 – 5634 = 2313.

                    Example 2. Subtract 6578 from 9999.

                    Solution. Write the numbers in columns and subtract them.
                    Step 1.  Subtract the ones. 9 – 8 = 1 one                                             Th H      T O

                    Step 2.  Subtract the tens. 9 – 7 = 2 tens                                             9    9   9   9

                    Step 3.  Subtract the hundreds. 9 – 5 = 4 hundreds                                 –   6    5   7    8

                    Step 4.  Subtract the thousands. 9 – 6 = 3 thousands
                    So, 9999 – 6578 = 3421.                                                                3    4   2    1

                                Exercise 3C

                        1.  Subtract.

                           a.       6 4 5 9         b.       7 6 0 4          c.     9 9 4 9          d.      4 8 7 4
                                – 3 2 4 5                – 5 6 0 1                – 7 8 3        1        –   1   3 4 4

                           e.       6 4 9      1    f.       4 6 5 9          g.      7 2 4 9         h.      8 4 5 6
                                – 5 2 7 0                – 3 2 3 4                – 3 2      1   7        – 8 4 5 5

                       2.  Write in the columns and subtract.
                           a.    3214 – 1103        b.    5673 – 2433         c.   8964 – 3243         d.   9571 – 4320

                           e.    8434 – 2414        f.    9860 – 2040         g.   5612 – 2301         h.   4213 – 2212

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                                                                                                  Subtraction

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