The first train above weighs 147 tonnes.
The second train above weighs 184 tonnes.
How heavy is the blue locomotive and how heavy is each red coach?
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:
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See the National Curriculum page for links to related online activities and resources.