Unit 1: GCF and LCM - 6th Grade Math - Google 6th Grade Math. Home; Sitemap; Home. Unit 1: GCF and LCM. Unit 2: Decimal Operations. Unit 3: Mult./Division of Fractions. Unit 4: Ratios and Rates. ... (LCM) and the greatest common factor (GCF) of two whole numbers (NS.6NS.4b) Use the distributive property to factor out the greatest common factor from an addition expression with two whole ...