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

1.42 39 = ______________  26.46 23 = ______________
2.36 26 = ______________  27.91 67 = ______________
3.33 33 = ______________  28.28 13 = ______________
4.43 38 = ______________  29.65 37 = ______________
5.27 27 = ______________  30.97 16 = ______________
6.84 44 = ______________  31.78 40 = ______________
7.83 55 = ______________  32.77 42 = ______________
8.76 57 = ______________  33.90 50 = ______________
9.62 12 = ______________  34.26 17 = ______________
10.89 66 = ______________  35.47 26 = ______________
11.80 49 = ______________  36.46 33 = ______________
12.90 23 = ______________  37.49 25 = ______________
13.96 71 = ______________  38.32 12 = ______________
14.63 22 = ______________  39.71 12 = ______________
15.85 17 = ______________  40.89 38 = ______________
16.43 20 = ______________  41.56 50 = ______________
17.83 25 = ______________  42.95 13 = ______________
18.99 35 = ______________  43.47 16 = ______________
19.19 18 = ______________  44.80 36 = ______________
20.81 45 = ______________  45.99 68 = ______________
21.63 10 = ______________  46.54 49 = ______________
22.69 56 = ______________  47.44 20 = ______________
23.47 15 = ______________  48.86 23 = ______________
24.41 30 = ______________  49.56 12 = ______________
25.37 29 = ______________  50.43 34 = ______________