Number Monster Instructions:
First, pick what you want to do: addition, subtraction, multiplication or division.
Then, pick your level...
easy = single digits... like 8+3
easy2 = a two-digit number plus a single-digit number... like 63+8
medium = up to three-digit numbers... like 73+345
hard = positive and negative numbers, up to two digits... like -23+8
harder = positive and negative numbers, up to four digits... like -2134+8764
killer = decimals
For easier decimals, check out Coolmath's Decimals Cruncher
monster = positive and negative decimals
The Number Monster will keep track of your score. When you move to a new operation (addition, subtraction, multiplication or division), your score will start over again.