Which would you do in your head? Image

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Which would you do in your head?

This resource invites students to think about how they currently operate with number before looking at how to solve 38 + __ = 66 using a bar diagram.

Additional details

Year level(s) Year 2, Year 3
Audience Student, Teacher
Purpose Teaching resource, Teaching strategies
Format Video
Teaching strategies and pedagogical approaches Questioning, Targeted teaching, Concrete Representational Abstract model
Keywords mental strategies,,,,,,,, written strategies, bar diagram, addition, subtraction, reasoning, fluency, understanding, explicit teaching

Curriculum alignment

Curriculum connections Numeracy
Strand and focus Number, Build understanding
Topics Place value, Addition and subtraction, Operating with number
AC: Mathematics content descriptions
ACMNA030 Solve simple addition and subtraction problems using a range of efficient mental and written strategies
ACMNA055 Recall addition facts for single-digit numbers and related subtraction facts to develop increasingly efficient mental strategies for computation
National numeracy learning progression Quantifying numbers
Additive strategies - AdS7
Multiplicative strategies

Copyright details


NSW Department of Education


© State of New South Wales (Department of Education), 2020 Creative Commons Attribution 4.0, unless otherwise indicated.