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

1.64 + 3 =   26.97 + 1 =
2.33 + 4 =   27.81 + 5 =
3.91 + 4 =   28.93 + 6 =
4.67 + 2 =   29.50 + 4 =
5.5 + 4 =   30.33 + 5 =
6.11 + 2 =   31.21 + 4 =
7.85 + 4 =   32.60 + 3 =
8.41 + 1 =   33.81 + 3 =
9.38 + 1 =   34.57 + 1 =
10.73 + 2 =   35.34 + 1 =
11.73 + 2 =   36.91 + 7 =
12.48 + 1 =   37.70 + 2 =
13.30 + 9 =   38.24 + 1 =
14.65 + 1 =   39.61 + 5 =
15.30 + 8 =   40.87 + 1 =
16.11 + 5 =   41.52 + 4 =
17.40 + 6 =   42.61 + 8 =
18.54 + 1 =   43.21 + 3 =
19.55 + 2 =   44.90 + 8 =
20.92 + 7 =   45.30 + 6 =
21.24 + 5 =   46.74 + 4 =
22.60 + 1 =   47.72 + 3 =
23.32 + 3 =   48.80 + 5 =
24.83 + 2 =   49.84 + 1 =
25.32 + 7 =   50.41 + 2 =