Grade 3 Math Worksheets - Mathinenglish.com Our grade 3 math worksheets are free and printable in PDF format. Based on the Singaporean math curriculum grade level 3, these worksheets are made for students in third grade level and cover math topics such as: place value, spelling, addition, subtraction, division, multiplication, fractions, graphing, measurement, mixed operations, geometry, area and perimeter, and time.