Skill Sharpeners Math, Grade 3 provides practice for the following mathematics skills: read, write, and compare numbers to 10,000, addition and subtraction facts to 18, two- and three-digit addition and subtraction with and without regrouping, multiplication and division facts to 81, multipy a two- and three-digit number by a one-digit number with and without regrouping, division with and without remainders, value of pennies, nickels, dimes, quarters, dollar bills, solve word problems, tell time to the minute, identify fractions - 1/2, 1/3, 1/4, 3/4, 2/3, 1/6, 1/8, read and create graphs, measure to the nearest half inch, geometry - basic shapes, symmetry, perimeter.