Mathematics, Grade 6 add circle circumference decimal denominator diameter divide division equation equivalent estimation strategies evaluate experimental probability exponents expression formulas fraction graph multiplication multiply numerator order of operations pattern percent pi (π) place value probability product quotient rate ratio represent simplest form simplify solution solve standard units of measure, both metric and customary (e.g., linear, area, volume, time) subtract table theoretical probability unknown quantities value variable Note: Greatest Common Factors, Least Common Multiples, Primes, Composites, and Prime Factorization, while not mentioned in the standards, are certainly appropriate for instruction beginning in grade 5 or 6. However, for assessment purposes, they may not be assessed by name. These concepts must be introduced through an explanation or a context. Mathematics Test Specifications and Test Blueprints 26 Oregon Department of Education Office of Assessment and Information Services