1.7 + 5 = 129 + 4 = 137 + 9 = 161 + 1 = 27 + 2 = 9
2.0 + 2 = 28 + 6 = 144 + 3 = 71 + 6 = 72 + 3 = 5
3.4 + 5 = 92 + 5 = 73 + 7 = 103 + 1 = 45 + 0 = 5
4.9 + 7 = 162 + 8 = 104 + 5 = 97 + 6 = 136 + 7 = 13
5.1 + 3 = 46 + 5 = 118 + 6 = 143 + 8 = 118 + 2 = 10
6.9 + 8 = 175 + 9 = 148 + 8 = 163 + 6 = 93 + 8 = 11
7.6 + 1 = 76 + 1 = 77 + 7 = 146 + 2 = 83 + 1 = 4
8.1 + 1 = 22 + 6 = 88 + 8 = 167 + 4 = 118 + 1 = 9
9.4 + 1 = 54 + 7 = 119 + 0 = 93 + 2 = 56 + 7 = 13
10.3 + 4 = 79 + 3 = 123 + 3 = 68 + 7 = 151 + 8 = 9
11.1 + 8 = 99 + 5 = 144 + 3 = 74 + 8 = 124 + 1 = 5
12.5 + 6 = 113 + 9 = 123 + 6 = 93 + 5 = 85 + 4 = 9
13.1 + 7 = 89 + 2 = 113 + 2 = 55 + 2 = 73 + 7 = 10
14.0 + 2 = 23 + 3 = 66 + 4 = 104 + 6 = 109 + 7 = 16
15.5 + 4 = 91 + 4 = 58 + 5 = 137 + 5 = 121 + 2 = 3
16.4 + 7 = 115 + 8 = 131 + 9 = 109 + 4 = 138 + 3 = 11
17.1 + 2 = 34 + 9 = 135 + 3 = 89 + 6 = 158 + 1 = 9
18.3 + 5 = 87 + 1 = 86 + 4 = 109 + 5 = 147 + 4 = 11
19.6 + 8 = 146 + 5 = 112 + 7 = 96 + 2 = 83 + 9 = 12
20.3 + 4 = 77 + 3 = 107 + 7 = 142 + 6 = 81 + 9 = 10

answers to this test: jakeholland.net/multest.php?vals=0-9&op=add&seed=466436240&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