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

1.8 6 =   26.8 5 =
2.4 3 =   27.4 3 =
3.5 1 =   28.6 3 =
4.3 3 =   29.9 7 =
5.8 3 =   30.4 2 =
6.6 4 =   31.8 1 =
7.9 5 =   32.6 6 =
8.7 2 =   33.7 6 =
9.9 1 =   34.7 5 =
10.4 3 =   35.9 7 =
11.5 3 =   36.9 8 =
12.5 1 =   37.4 1 =
13.9 1 =   38.9 5 =
14.7 5 =   39.6 1 =
15.1 1 =   40.9 7 =
16.6 1 =   41.7 7 =
17.7 2 =   42.9 8 =
18.3 1 =   43.3 2 =
19.7 2 =   44.7 5 =
20.2 1 =   45.7 5 =
21.5 1 =   46.3 2 =
22.1 1 =   47.6 3 =
23.4 2 =   48.6 3 =
24.7 7 =   49.4 1 =
25.6 6 =   50.9 7 =