1. Multiplication as Repeated Addition
Relation of multiplication to repeated addition, i.e. multiplying a x b is the same as adding b repeatedly a number of times. Given equal groups of objects (arranged in arrays), students write addition and multiplication equations for the total number of objects. For example, for objects arranged in 4 rows and 5 columns (20 in all); 5 + 5 + 5 + 5 and 4 x 5 represents the total number of objects.
Common Core Alignment
3.OA.1Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each.