8th Grade Math Worksheets - TeAch-nology.com 8th Grade Math Worksheets 8th Grade Math Worksheets (Grade 8 - For Ages 13 to 14) Math in the 8th grade begins to prove more substantial as far as long range skills students will use and need. Students work towards mastery with the basic order of operations. Expressions, function tables, probability as begin to work at the core of this grade level.