Using string lines 0 Overview Connecting to the Curriculum Marking Student Responses Working with Students This task is about adding lengths of string together. Question 1Change answer a) A builder tied strings between 5 pegs as shown, to mark out where concrete was to be laid. How much string was used? m b) If the builder removed the 2 diagonal strings (inside the square), what length of string would be left? m Level: 4 Curriculum info: Maths, Geometry and Measurement, Measurement Keywords: length, perimeter, composite shapes, addition Description of task: Students calculate the length of a builder's string line. Learning Progression FrameworksThis resource can provide evidence of learning associated with Additive thinking, sets 7-8Measurement sense, sets 6-7 within the Mathematics Learning Progressions Frameworks.Read more about the Learning Progressions Frameworks. Answers/responses: Y7 (07/1997) Y8 (07/1997) a) 162.8 moderate moderate b) 106 [Accept correct subtraction of 56.8 from answer to a).] easy easy Diagnostic and formative information: Common error Likely misconception a) b) 94.4 66 Adds the marked dimensions only. a) b) 142.8 86 Ignores 1 side of the square. a) 122.8 219.6 Ignores 2 sides of the square. Uses 4 diagonals instead of 2.
