When you're telling time
Trigonometry
In Australia
In outer space
8
10
18
0
8 + 2 = 4 + 6
2 + 4 + 6 = 8
6 + 2 = 4 + 8
2 + 4 + 6 + 8
.
+
-
x
3
12
9
362,880
123,456,789
29
25
16
32