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    Step 2. Add the tens and regroup.                        Step 3. Add the hundreds and regroup.

                                         Th H      T O                                         Th H      T O

                                               1   1                                            1    1   1
                                               7   6   5                                            7    6   5

                                      +       3    8   9                                    +       3    8   9

                                                   5   4                                        1    1   5   4

                    1 + 6 + 8 = 15 tens = 1 hundred 5 tens                 1 + 7 + 3     = 11 hundreds
                                                                                         = 1 thousand 1 hundred

                    Write 5 in the tens place and carry over               Write 1 in the hundreds place and 1 in the
                    1 to the hundreds column.                              thousands place.

                                Exercise 2B

                        1.  Add:

                           a.         4 3 2         b.         7 3 5          c.        2 4 5          d.        5 2 3
                                  +   1  3 0               +   1   1  4             + 3 2 4                   +  1   2 3

                           e.         7 0 2         f.         5 3 3          g.        2 7 2          h.        6 6 2
                                  +   1 0 4                + 3 4 4                  + 4 0 3                   + 3 2 3

                       2.  Find the sum. (use regrouping.)

                           a.         3 3 7           b.       3 2 5           c.       5 6 9          d.      1  6 2
                                  + 4     1  6             + 4 4 9                  + 3     1  9           +   2 9 4

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

                                  +   1  8 3               +   1   8 2              +   1  3 6             +   2 4 8

                           i.            5 6 4        j.           7 9 6       k.          5 6 4       l.         9 4 3
                                  +      8 3 2             +       3 4 8            +      6 4 8           +      2 9 8

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