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Understand doubles/halves to 20
In-depth Investigation: Double or halve? from nrich.maths.org
Understand hours, minutes, seconds
In-depth Investigation: Order, Order! from nrich.maths.org
Understand multiplication as sets; recognise patterns
In-depth Investigation: Clapping Times from nrich.maths.org
Find fraction of shapes (1/2, 1/4, 1/3)
In-depth Investigation: Halving from nrich.maths.org