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Fractions Made Faster

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

Fractions Made Faster


You may like to try our Fractional Wall problem before this one.

fraction wall of halves, thirds, quarters, sixths, eighths, twelfths and twenty-fourths

Using the fraction wall above, can you say which is bigger, $\frac{1}{3}$ or $\frac{2}{8}$? By how much?

Which is smaller, $\frac{5}{6}$ or $\frac{3}{4}$? By how much?

What is the difference between $\frac{5}{6}$ and $\frac{1}{3}$?

What is three quarters of $\frac{2}{3}$? Can you explain how you worked this out?

Having a visual representation of fractions as a wall will aid children's understanding of both equivalent fractions and comparisons of fractions, but perhaps it will also equip them with a method to help them in the future. It is important that pupils have an appreciation of what is being taken as "the whole" and this may need some discussion before the problem as it stands is tackled. Using real Cuisenaire rods to aid manipulation of fractions is invaluable, although the lengths pose some restrictions. However, OHT rods could be used as a way into the problem by concentrating on just a few different lengths to start with.

This could be used to help older children to understand the concepts necessary for manipulating fractions to add and subtract them. It is amazing how much easier the visualisation makes the arithmetic process. Just try it yourself and see.