Level 2 Sums 9 to 12 Adding and subtracting basic equations by sight is essential to a solid math foundation Meet the Math Facts ... easily recall basic math facts to 10 10 Preschool Prep Series ...

Level 3 Sums 13 to 20 Adding and subtracting basic equations by sight is essential to a solid math foundation Meet the Math Facts 1 2 and 3 make ... basic math facts to 10 10 Preschool Prep ...