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AC9M3N05

estimate the quantity of objects in collections and make estimates when solving problems to determine the reasonableness of calculations

Elaborations

  • AC9M3N05_E1estimating how much space a grid paper representation of a large number such as 20 200 will take up on the wall and how much paper will be required
  • AC9M3N05_E2estimating the number of people in a large gathering; for example, school assembly, using known numbers, such as how many students per class
  • AC9M3N05_E3choosing which place value they would estimate to for different situations; for example, they would estimate to the nearest 10 when estimating how many dots on a ladybird or they would estimate to the nearest 1000 when estimating crowd sizes at a venue
  • AC9M3N05_E4checking the reasonableness of an addition calculation by using two- and three-digit numbers to the nearest 10 or hundred to estimate; for example, using 200 + 400 = 600 to estimate and check the solution to the calculation 219 + 385

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AC9M3N05 – estimate the quantity of objects in collections and make estimates when solving problems to determine the reasonableness of calculations | LessonForge