add and subtract one- and two-digit numbers, representing problems using number sentences, and solve using part-part-whole reasoning and a variety of calculation strategies

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 the associative property of addition to assist with mental calculation by partitioning, rearranging and regrouping numbers using number knowledge, near doubles and bridging to \(10\) strategies; for example, calculating \(7 + 8\) using \(7 + (7 + 1) = (7 + 7) + 1\) , the associative property and near doubles; calculating \(7 + 8\) using the associative property and bridging to \(10\) , \(7 + (3 + 5) = (7 + 3) + 5\)
• using strategies such as doubles, near doubles, part-part-whole knowledge to \(10\), bridging tens and partitioning to mentally solve problems involving two-digit numbers; for example, calculating \(56 + 37\) by thinking \(5\) tens and \(3\) tens is \(8\) tens, \(6 + 7 = 6 + 4 + 3\) is one \(10\) and \(3\), and so the result is \(9\) tens and \(3, 93\)
• representing addition and subtraction problems using a bar model and writing a number sentence, explaining how each number in the sentence is connected to the situation