Demo: https://daghall.github.io/arithmetic/
| Key | Command |
|---|---|
0-9 |
Set active operand |
Up |
Increase active operand |
Down |
Decrease active operand |
Left |
Switch to left operand |
Right |
Switch to right operand |
Tab |
Switch active operand |
Enter |
Swap operands |
Space |
Cycle operation: +, −, ×, ÷ |
+ |
Set operation to + |
- |
Set operation to − |
* |
Set operation to × |
/ |
Set operation to ÷ |
: |
Toggle visualization mode |
r |
Randomize operands and operation |
0-9 followed by +, −, × or ÷ automatically switches active operand,
and switches back if followed by 0-9 again.