Subtraction using a Number Line
10 - 6 = 4
         0        1           2   3   4   5   6   7   8   9   10   11
www.communication4all.co.uk
                         Subtraction using a Number Line
                                   22 - 3 = 19
                                                  -2
        15       16           17   18   19   20   21   22   23   24   25   26
www.communication4all.co.uk
                         Subtraction using a Number Line
                              75 - 28 = 47
                               -8        -10        -10
                       47           55         65          75
www.communication4all.co.uk
                   Subtraction using Diennes Apparatus
                              58 - 16 = 42
www.communication4all.co.uk