Instructions: Click on the street and avenue signs to assign values to them. When you go along the roads you multiply values going up and divide going down, add going left and subtract going right. CLick on the car to set a value to the block of flats in the bottom right hand corner. Try to assign values to the streets and avenues so that whichever route you take between two buildings the result is the same. You should find you can generate a number of equivalent expressions by taking different routes between locations.
