Multiplying decimals – area model

MathematicsNumbers & ArithmeticAges 11–12

Drag two sides of a rectangle to change two decimal factors; the rectangle is split into ones, tenths and hundredths, each part is a partial product, and the parts add up to exactly the product. The Game screen has 3 levels × 5 questions: find a partial product, find the total area, then find the missing side from the area, with scoring and stars. Adapted from the "Area Model: Decimals" simulation by PhET Interactive Simulations, University of Colorado Boulder (CC BY 4.0); rewritten.

Lesson: Decimals and decimal operations