Use the formula triangle to establish the correct calculation by covering up what needs to be worked out. To work out speed, cover the S. To work out distance, cover the D. To work out time ...

We can use formulas to model real-life situations. For example, the formula for calculating speed is speed = distance ÷ time. It is possible to calculate the speed, distance or time if you have ...

How I found out The distance formula is explained in an article in The Sunday Oregonian of July 16, 1933. The writer was Hilmar Grondahl. When I started work at The Oregonian as a copy editor in ...