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

1.84 24 = ______________  26.20 19 = ______________
2.80 75 = ______________  27.70 10 = ______________
3.93 56 = ______________  28.46 12 = ______________
4.65 15 = ______________  29.94 16 = ______________
5.94 21 = ______________  30.86 85 = ______________
6.39 36 = ______________  31.92 13 = ______________
7.92 59 = ______________  32.56 12 = ______________
8.95 95 = ______________  33.83 31 = ______________
9.29 28 = ______________  34.98 98 = ______________
10.80 65 = ______________  35.65 27 = ______________
11.27 23 = ______________  36.48 24 = ______________
12.92 79 = ______________  37.88 42 = ______________
13.98 74 = ______________  38.78 51 = ______________
14.90 32 = ______________  39.37 28 = ______________
15.75 64 = ______________  40.74 47 = ______________
16.16 12 = ______________  41.94 81 = ______________
17.45 38 = ______________  42.87 38 = ______________
18.75 28 = ______________  43.77 60 = ______________
19.59 54 = ______________  44.85 78 = ______________
20.81 47 = ______________  45.37 28 = ______________
21.32 22 = ______________  46.50 40 = ______________
22.39 18 = ______________  47.87 31 = ______________
23.64 31 = ______________  48.70 40 = ______________
24.68 61 = ______________  49.57 19 = ______________
25.87 29 = ______________  50.94 34 = ______________