Lesson Guide in Elementary Mathematics Grade 3. Chapter I, Whole Numbers, Division Dividing Mentally 2-Digits Numbers by Lesson Guide in Elementary Mathematics Grade 3. Chapter II, Rational Numbers, Fractions Proded Math. III-C: Division of whole numbers (without remainder) Proded Math. III-C: Multiplying whole numbers with regrouping Visualizing and Representing Dissimilar Fractions (M3NS-III-72.6) (Lesson Exemplar) Proded Math. III-A: Multiplying whole numbers with regrouping Proded Math. III-B: Multiplying whole numbers with regrouping Proded Math. III-B: Division of whole numbers (without remainder)