Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 62 - Touchpad Mathematics_Ver1.0_C4
P. 62

    Step 2. Subtract the tens.                              Step 3. Subtract the hundreds.

                                H    T O                                               H    T O

                                     9                                                      9

                                4 10 10                                                 4 10 10
                                5 0 0                                                  5 0 0

                            –   2    6   8                                         –   2    6   8

                                     3   2                                             2    3   2

                        9 – 6 = 3 tens                                          4 – 2 = 2 hundreds
                So, 500 – 268 = 232.

                            Exercise 3B

                    1.  Subtract without regrouping.

                        a.       4   3   6      b.        5   7   6      c.        9   3   7     d.         8    6   9

                             –   3   1   2            –   4   2   3           –    4   3   2            –   5 0      3

                    2.  Subtract by regrouping tens to ones.
                        a.       6   4   3      b.        5   6 0        c.        7   6   2     d.         5    4   2

                             –   3   1   4            –   2   3   8           –    1   4   8            –    1   1   7

                    3.  Subtract by regrouping hundreds to tens.
                        a.       6   4   5      b.        7   2   4      c.        8   4   6     d.         4    3   9

                             –   1   8   3            –   3   4   2           –    4   8   3            –   2    5   3

                    4.  Subtract by regrouping both hundreds and tens.
                        a.       4   3   2      b.        6 0     4      c.        7   6   5     d.         9    3   4

                             –   1   7   5            –   2   8   5           –    5   8   7            –   6    4   6

                  5.  Find the difference.
                        a.       5 0 0          b.        9 0 0          c.        3   2   0     d.         5 0      4

                             –   3   9   4            –   4   8   8           –    1   7   5            –   2    4   8

                       60        Mathematics 3

| 57 58 59 60 61 62 63 64 65 66 67 |