AC9M3N05
Year 3
Mathematics
AC9M3N05 | Year 3 Mathematics: Number
Content Descriptor
Content descriptor estimate the quantity of objects in collections and make estimates when solving problems to determine the reasonableness of calculations
Strand
Number
Substrand
Number
This content descriptor sets out learning for Year 3 Mathematics. Use it to plan lessons and assessment with the Australian Curriculum v9.
Elaborations
- • Elaboration estimating 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
- • Elaboration estimating the number of people in a large gathering; for example, school assembly, using known numbers, such as how many students per class
- • Elaboration choosing 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
- • Elaboration checking 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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