Grade 4 Mental Maths Worksheets With Answers Maths Worksheet For Class 3, Grade 3 Math Worksheets Pdf. Third (3rd) Grade Math Worksheets and Printable PDF Handouts. Here is a collection of grade 3 math worksheets pdf displayed with thumbnails that each represent the complete worksheet.Each maths worksheet for class 3 is a printable pdf document with an answer key attached to the second page.Answer keys serve as references for educators ...