EASY SUBTRACTION. Be able to answer this in less than one minute.

1.5 2 =   26.7 5 =
2.4 2 =   27.7 3 =
3.6 2 =   28.4 1 =
4.5 3 =   29.9 3 =
5.8 4 =   30.9 2 =
6.7 4 =   31.6 2 =
7.7 3 =   32.8 5 =
8.7 1 =   33.8 2 =
9.8 3 =   34.8 5 =
10.6 1 =   35.7 3 =
11.4 4 =   36.9 4 =
12.1 1 =   37.9 4 =
13.7 1 =   38.8 5 =
14.8 6 =   39.5 4 =
15.6 4 =   40.2 2 =
16.6 6 =   41.8 8 =
17.9 9 =   42.6 3 =
18.6 1 =   43.7 2 =
19.9 9 =   44.8 2 =
20.9 1 =   45.8 3 =
21.9 6 =   46.2 1 =
22.4 2 =   47.9 9 =
23.8 6 =   48.7 5 =
24.9 4 =   49.7 3 =
25.8 6 =   50.8 2 =