Level: 0 (Addition) 1 (Subtraction) 2 (Missing Addend) 3 (Missing Addend 2) 4 (Comparison) 5 (Sum Comparison) 6 (Multiplication) 7 (Missing Factor) 8 (Add 2-digit) 9 (Subtract 2-digit) 10 (Addition [text]) 11 (Add 3 numbers [text]) 12 (Add 4 numbers [text]) 13 (Subtract [text]) 14 (Multiplication [text]) 15 (Missing Factor [text]) All Max Number: