January 25th, 2012 
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Theory: Volume and Area are similar. The only difference is that area focuses on two measurements: width and length; and volume focuses on three measurements: width, length and height. Children seem to find the area and volume of objects very easily, if the measurements are given to them. When the volume or area is given and they must find the missing measurement, they seem to not know how to do it. A way of approaching this problem is by teaching them how to solve for a missing number. Using the formula for area or volume that they are already comfortable with, they can find a missing measurement.
A rectangular sheet of wood has four small squares removed. It is then cut to make a box that is 5cm by 4cm with a volume of 60cm3. (Four pieces of size “4” are removed.)
What is the original area of the sheet of wood?
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