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Perimeters: composite and rectilinear
In-depth Investigation: Area and Perimeter from nrich.maths.org.
Place 2-digit & 3-digit numbers on lines
In-depth Investigation: Reasoned Rounding from nrich.maths.org.
Place 3- and 4-digit numbers on a line
In-depth Investigation: The Thousands Game 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.
Place 6-digit numbers on a line; round
In-depth Investigation: Adapt Nice or Nasty (Game 5, Nasty Version) from nrich.maths.org.