Goal:  Combine the values and operators shown to determine just how MathFit you are. 
Values:  At the beginning of each turn, each of the four value boxes are randomly populated with a value from 9 to 9. 
Operators:  At the beginning of each turn, each of the four operator boxes are randomly populated with one of the following operators based on the selected difficulty.

Moves:  On each move the result from the values and operators you combine will be added to or subtracted from your score. 
Hints:  The hint button (?) will help you decide what values and operators to combine. 
Challenges:  Periodically you will be given the option to take on challenges and with them the risks and rewards they offer. 
Available on Easy, Normal and Hard.
7 → + → 3 is calculated as 7 + 3 = 4
7 ← + ← 3 is calculated as 3 + 7 = 4
Available on Easy, Normal and Hard.
8 →  → 2 is calculated as 8  2 = 10
8 ←  ← 2 is calculated as 2  8 = 10
Available on Normal and Hard.
6 → * → 5 is calculated as 6 * 5 = 30
6 ← * ← 5 is calculated as 5 * 6 = 30
Available on Normal and Hard.
1 → ÷ → 4 is calculated as 1 ÷ 4 = 0.25
1 ← ÷ ← 4 is calculated as 4 ÷ 1 = 4
Available on Hard.
3 → ^ → 8 is calculated as 3^8 = 6,561
3 ← ^ ← 8 is calculated as 8^3 = 0.002
Available on Hard.
9 → √ → 2 is calculated as 9^(1/2) = 3
9 ← √ ← 2 is calculated as 2^(1/9) = 1.08
NaN:  Not a number (nan) will be displayed if the selected values and operator cannot be calculated.

±Inf:  Infinity (±inf) will be displayed if the selected values and operator result in a unimaginable value.

Game over:  Some calculators will show "Error" instead of (nan) or (±inf). Regardless of the error message, these errors mean game over. 