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

1.66 64 = ______________  26.84 51 = ______________
2.50 26 = ______________  27.94 28 = ______________
3.70 60 = ______________  28.69 11 = ______________
4.85 36 = ______________  29.81 25 = ______________
5.95 68 = ______________  30.76 50 = ______________
6.63 18 = ______________  31.76 61 = ______________
7.30 30 = ______________  32.47 10 = ______________
8.69 49 = ______________  33.51 39 = ______________
9.71 48 = ______________  34.25 13 = ______________
10.87 46 = ______________  35.97 96 = ______________
11.74 44 = ______________  36.91 87 = ______________
12.34 29 = ______________  37.96 26 = ______________
13.18 10 = ______________  38.58 48 = ______________
14.81 31 = ______________  39.96 58 = ______________
15.96 34 = ______________  40.98 15 = ______________
16.51 32 = ______________  41.88 47 = ______________
17.72 10 = ______________  42.79 36 = ______________
18.63 27 = ______________  43.92 43 = ______________
19.95 90 = ______________  44.72 33 = ______________
20.81 22 = ______________  45.29 23 = ______________
21.85 22 = ______________  46.66 45 = ______________
22.75 15 = ______________  47.79 30 = ______________
23.49 29 = ______________  48.84 15 = ______________
24.83 72 = ______________  49.74 52 = ______________
25.49 39 = ______________  50.38 38 = ______________