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

1.77 45 = ______________  26.73 68 = ______________
2.48 17 = ______________  27.75 66 = ______________
3.87 53 = ______________  28.58 40 = ______________
4.67 52 = ______________  29.89 88 = ______________
5.38 29 = ______________  30.80 76 = ______________
6.97 11 = ______________  31.75 18 = ______________
7.53 14 = ______________  32.42 32 = ______________
8.52 47 = ______________  33.48 44 = ______________
9.68 64 = ______________  34.80 44 = ______________
10.75 68 = ______________  35.82 25 = ______________
11.56 30 = ______________  36.63 48 = ______________
12.58 19 = ______________  37.88 19 = ______________
13.83 16 = ______________  38.65 40 = ______________
14.87 83 = ______________  39.81 33 = ______________
15.66 40 = ______________  40.77 20 = ______________
16.33 28 = ______________  41.86 12 = ______________
17.68 40 = ______________  42.82 17 = ______________
18.47 44 = ______________  43.53 18 = ______________
19.77 73 = ______________  44.73 38 = ______________
20.39 11 = ______________  45.17 13 = ______________
21.70 23 = ______________  46.67 25 = ______________
22.61 16 = ______________  47.76 55 = ______________
23.88 12 = ______________  48.36 16 = ______________
24.87 40 = ______________  49.71 62 = ______________
25.22 15 = ______________  50.23 17 = ______________