Mental math drill
Numbers flash on screen and vanish. You hold them in your head, not your eyes, and add or multiply.
Press start and the numbers appear after a countdown
The numbers
Added up
0
Multiplied and added ×2
0
Numbers flash on screen and vanish. You hold them in your head, not your eyes, and add or multiply.
The numbers
Added up
0
Multiplied and added ×2
0