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multiplication. n. 1. (Mathematics) an arithmetical operation, defined initially in terms of repeated addition, usually written a Ã b, a.b, or ab, by which the product of two quantities is calculated: to multiply a by positive integral b is to add a to itself b times.
Multiplication Study Guide. MCC4.NBT.5: Multiply a whole number of up to four digits by a one-digit whole number, and multiply two. two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and. explain the calculation by using equations, rectangular arrays, and/or area models.