For example
Half a roti and a third of a roti are unlike fractions.
In Grade 3
Children line up fraction strips with different sized parts and see why they cannot be added directly.
Watch out for
Children often add unlike fractions by adding the tops and the bottoms. The parts have to be made the same size first.
Say it at home
Compare a half and a third with folded paper and ask why they are hard to add.
Try it together
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