123s +-x÷

123s +-x÷ is a Search Puzzle for Math Training. Lets enjoy arithmetic.
+ and - , x and ÷ are pairs.
It becomes very effective mathematics training to repeat an addition calculation and a subtraction calculation with the same number. The multiplication and division is similar, too.
QAs example:
kind is x÷, calc. numberis 9, QA min is 1, QA max is 9
QAs of case x 9
1 x 9 = 9
2 x 9 = 18
3 x 9 = 27
4 x 9 = 36
5 x 9 = 45
6 x 9 = 54
7 x 9 = 63
8 x 9 = 72
9 x 9 = 81
QAs of case ÷ 9
9 ÷ 9 = 1
18 ÷ 9 = 2
27 ÷ 9 = 3
36 ÷ 9 = 4
45 ÷ 9 = 5
54 ÷ 9 = 6
63 ÷ 9 = 7
72 ÷ 9 = 8
81 ÷ 9 = 9