Bar Model for Problems on Ratio Rate Direct Proportion
- Lew W. S.
- Arithmetic, Ratios
Use this applet to understand arithmetic problems related to rate, ratio, direct proportion. Do you know why when we do arithmetic involving ratio, rate and direct proportion we always divide to a single unit of the item on the left before multiplying to get the answer? After manipulating and exploring the Bar Model applet below, do you get the concept now?