Multiplying by 2: 4 x 2

Arithmetic · Axiom Academy

A step-by-step walkthrough of 4 × 2 using groups, an array, and repeated addition Find the value of . We will see what this product means using groups of counters, an array, and repeated addition. as 4 groups of 2 — the same 8 counters arranged as a 4-row, 2-column array Nice work — you built from the ground up: its meaning, its picture, and its total. Meaning: is 4 groups of 2 — the same as adding 2 four times. Array: the counters fit a 4-row by 2-column array, and counting them gives the product. The same picture works for any product. For example, 3 groups of 2 give 2 + 2 + 2 = 6 , so .

This is the written version of the interactive lesson above. See the full Arithmetic course.