When if ever do you get the right answer if you add two fractions by adding the numerators and adding the denominators?
Show that it is rare for a ratio of ratios to be rational.
This article for primary teachers outlines why developing an intuitive 'feel' for numbers matters, and how our activities focusing on factors and multiples can help.
This video of Charlie and Liz solving a 6 by 6 Mathdoku may give you ideas for strategies to try.
This article for teachers describes how number arrays can be a useful representation for many number concepts.
This article explains various divisibility rules and why they work. An article to read with pencil and paper handy.
Take a complicated fraction with the product of five quartics top and bottom and reduce this to a whole number. This is a numerical example involving some clever algebra.
