Math: Drawing to scale

http://www.themoneybelt.gc.ca/theCity-laZone/eng/login-eng.aspx
https://www.ixl.com/math/grade-7/scale-drawings-and-scale-factors
http://www.mathgames.com/skill/7.159-scale-drawings-and-scale-factors
http://www.math4children.com/Grade5/quizzes/Ratios,%20proportions,%20percents/Scale_covertions/Scale%20drawings/index.html
http://resources.woodlands-junior.kent.sch.uk/maths/measures/capacity.html