🟦 Multiplying with the area model

Unit 2 · Algebra & data · 9 min

Split 23 × 14 into a rectangle: (20+3) × (10+4) = 200 + 80 + 30 + 12 = 322. Add the areas of the small pieces. It is exactly how (a+b)(c+d) expands in algebra.

Project: Draw the area model of 16 × 15, colour the four parts differently and compute the total.