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Division of big numbers: vertical layout
In-depth Investigation: Revision Rules from nrich.maths.org
Mixed numbers and fractions of amounts
In-depth Investigation: Balance of Halves from nrich.maths.org.
Perimeters: composite and rectilinear
In-depth Investigation: Area and Perimeter from nrich.maths.org.
Place 5-digit numbers on a line; round
In-depth Investigation: Adapt Nice or Nasty (Game 3) from nrich.maths.org.