1.8 + 6 = 143 + 9 = 126 + 9 = 157 + 9 = 168 + 4 = 12
2.3 + 2 = 53 + 7 = 108 + 7 = 152 + 7 = 94 + 6 = 10
3.9 + 7 = 168 + 5 = 136 + 8 = 143 + 4 = 71 + 6 = 7
4.6 + 3 = 99 + 6 = 153 + 3 = 63 + 2 = 50 + 3 = 3
5.1 + 7 = 83 + 8 = 119 + 3 = 129 + 2 = 112 + 3 = 5
6.1 + 6 = 71 + 9 = 108 + 7 = 156 + 3 = 96 + 2 = 8
7.9 + 1 = 108 + 6 = 148 + 8 = 167 + 3 = 102 + 6 = 8
8.5 + 6 = 119 + 5 = 143 + 6 = 93 + 8 = 116 + 1 = 7
9.8 + 1 = 91 + 5 = 63 + 1 = 46 + 5 = 111 + 4 = 5
10.9 + 8 = 171 + 1 = 25 + 4 = 91 + 7 = 88 + 8 = 16
11.4 + 9 = 135 + 9 = 147 + 6 = 134 + 0 = 47 + 7 = 14
12.5 + 3 = 86 + 8 = 142 + 4 = 68 + 1 = 94 + 2 = 6
13.7 + 7 = 148 + 5 = 137 + 5 = 127 + 1 = 83 + 9 = 12
14.5 + 7 = 124 + 8 = 124 + 1 = 56 + 9 = 152 + 9 = 11
15.4 + 4 = 85 + 6 = 116 + 7 = 139 + 4 = 134 + 3 = 7
16.2 + 1 = 33 + 1 = 49 + 3 = 128 + 9 = 178 + 3 = 11
17.3 + 3 = 65 + 7 = 120 + 2 = 25 + 1 = 66 + 4 = 10
18.6 + 1 = 75 + 2 = 70 + 5 = 51 + 5 = 60 + 2 = 2
19.4 + 9 = 134 + 3 = 72 + 1 = 37 + 6 = 132 + 6 = 8
20.7 + 1 = 86 + 6 = 125 + 0 = 55 + 8 = 137 + 8 = 15

answers to this test: jakeholland.net:80/multest.php?vals=0-9&op=add&seed=955597922&answer

random multiplication test: /multest.php?vals=0-9&op=mul
random division test: /multest.php?vals=0-9&op=div
random addition test: /multest.php?vals=0-9&op=add
random subtraction test: /multest.php?vals=0-9&op=sub