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

1.38 7 =   26.18 2 =
2.32 2 =   27.39 6 =
3.21 1 =   28.7 2 =
4.48 6 =   29.24 4 =
5.68 3 =   30.13 1 =
6.84 1 =   31.79 8 =
7.84 1 =   32.33 2 =
8.77 5 =   33.89 3 =
9.59 7 =   34.29 6 =
10.49 6 =   35.45 1 =
11.84 3 =   36.76 3 =
12.6 3 =   37.93 1 =
13.5 1 =   38.35 3 =
14.25 5 =   39.84 4 =
15.45 1 =   40.49 1 =
16.26 1 =   41.23 2 =
17.54 1 =   42.59 8 =
18.29 2 =   43.77 6 =
19.17 2 =   44.76 5 =
20.85 4 =   45.88 7 =
21.7 6 =   46.89 7 =
22.57 7 =   47.21 1 =
23.98 1 =   48.23 1 =
24.76 5 =   49.36 5 =
25.29 9 =   50.96 5 =