A bundle of nine fun, interactive PPT games designed to help develop children’s mental addition and subtraction skills. The titles of the games included are: Adding Two-Digit Numbers, Subtracting Two-Digit Numbers, Adding and Subtracting Two-Digit Numbers, Adding Multiples of 10, Adding Multiples of 100, Subtracting Multiples of 10, Subtracting Multiples of 100, Small Differences, and Adding and Subtracting Decimals. All Arithmetickx games incorporate 10 questions which increase in difficulty as