develop efficient strategies and use appropriate digital tools for solving problems involving addition and subtraction, and multiplication and division where there is no remainder

How Bloomi helps with this

This is a readiness-year topic that builds towards the next NAPLAN year. Bloomi practises it as curriculum mastery, never test drilling.

What this looks like in the classroom

• using and choosing efficient calculation strategies for addition and subtraction problems involving larger numbers; for example, place value partitioning, inverse relationship, compatible numbers, jump strategies, bridging tens, splitting one or more numbers, extensions to basic facts, algorithms and digital tools where appropriate
• using physical or virtual materials to demonstrate doubling and halving strategies for solving multiplication problems; for example, for \(5 \times 18\), using the fact that double \(5\) is \(10\) and half of \(18\) is \(9\); or using \(10 \times 18 = 180\) and halve \(180\) is \(90\); applying the associative property of multiplication, where \(5 \times18\) becomes \(5 \times 2 \times 9\), then \(5 \times 2 \times 9 = 10 \times 9 = 90\) so that \(5 \times 18 = 90\)
• using an array to represent a multiplication problem, connecting the idea of how many groups and how many in each group with the rows and columns of the array, and writing an associated number sentence