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

1.81 + 6 =   26.1 + 4 =
2.5 + 1 =   27.37 + 1 =
3.98 + 1 =   28.48 + 1 =
4.47 + 2 =   29.57 + 1 =
5.34 + 1 =   30.73 + 1 =
6.22 + 2 =   31.20 + 4 =
7.61 + 4 =   32.44 + 2 =
8.41 + 1 =   33.2 + 7 =
9.23 + 3 =   34.53 + 4 =
10.67 + 2 =   35.43 + 4 =
11.1 + 5 =   36.1 + 7 =
12.72 + 4 =   37.94 + 3 =
13.23 + 6 =   38.93 + 6 =
14.42 + 1 =   39.46 + 1 =
15.87 + 2 =   40.6 + 2 =
16.72 + 3 =   41.90 + 3 =
17.65 + 1 =   42.95 + 1 =
18.82 + 2 =   43.33 + 6 =
19.61 + 6 =   44.31 + 1 =
20.81 + 6 =   45.52 + 1 =
21.96 + 3 =   46.10 + 6 =
22.22 + 2 =   47.62 + 2 =
23.40 + 7 =   48.10 + 8 =
24.97 + 1 =   49.42 + 6 =
25.92 + 2 =   50.4 + 2 =