Grade 6 USA School Math Algebraic Expressions Grade 6 USA School Math Algebraic Expressions. Student Assignments . Create unlimited student assignments. Create New Student Assignment. Online Practice . Start New Online Practice Session. Online Tests . Start New Online test. Printable Worksheets and Tests . New Worksheet. Grade 6. 1. Large Numbers (7-Digit to 9-Digits) 2. Roman Numerals (up ...