Difficulty Information: Very Easy: 1 digit plus or minus 1 digit The easiest difficulty Recommended for Kindergarten or higher Easy: 2 digits plus or minus 2 digits The second easiest difficulty Recommended for grade 1 students or higher Medium: 2 digit minus or times 2 digit The normal difficulty Recommended for grade 2 students or higher Hard: 3 digits times 2 digits The harder normal difficulty Recommended for grade 4 students or higher Very hard: 3 digits times 3 digits The second hardest difficulty Recommended for over grade 4 students Easy Algebra: Equation solving The hardest difficulty Recommended for over grade 5 students Medium Algebra: Equation Solving The alternative hardest difficulty Recommended for over grade 5 students Hard Algebra: Equation Solving The actual hardest difficulty Recommended for over grade 5 students
