Maths Unit: Using a Bar Model to Solve Addition and Subtraction Problems
This comprehensive unit plan is specifically crafted for Year 2 teachers to enhance their students' mathematical proficiency through the innovative use of bar models. Designed to align with the curriculum standards, this unit aims to provide educators with a structured framework to teach addition and subtraction concepts effectively. The included worksheets, presentation, activities and assessment make this unit enjoyable for you and your students.
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Learning goals
- We are learning to add and subtract one- and two-digit numbers, using a variety of strategies, e.g. partitioning, doubles, near doubles, bridging to 10 and rearranging and regrouping of numbers.
- We are learning to recall addition facts to 20 and apply to related subtraction facts using a range of strategies.
- We are learning to solve problems by using number sentences for addition or subtraction.
- We are learning to use a range of mental and written strategies to solve simple addition and subtraction problems.
- We are learning to explore number sequences by twos, threes, fives and tens from any starting point.
- We are learning to use a range of mental strategies to solve simple addition and subtraction problems.
Curriculum alignment
AC9M2N04
9
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
AC9M2A02
9
Recall and demonstrate proficiency with addition facts to 20; extend and apply facts to develop related subtraction facts
ACMNA036
8.4
Solve problems by using number sentences for addition or subtraction
ACMNA030
8.4
Solve simple addition and subtraction problems using a range of efficient mental and written strategies
ACMNA026
8.4
Investigate number sequences, initially those increasing and decreasing by twos, threes, fives and tens from any starting point, then moving to other sequences
ACMNA055
8.4
Recall addition facts for single-digit numbers and related subtraction facts to develop increasingly efficient mental strategies for computation
MA1-1WM
old
Describes mathematical situations and methods using everyday and some mathematical language, actions, materials, diagrams and symbols
MA1-2WM
old
Uses objects, diagrams and technology to explore mathematical problems
MA1-3WM
old
Supports conclusions by explaining or demonstrating how answers were obtained
MA1-8NA
old
Creates, represents and continues a variety of patterns with numbers and objects
MA1-4NA
old
Applies place value, informally, to count, order, read and represent two- and three-digit numbers
MA1-CSQ-01
new
Uses number bonds and the relationship between addition and subtraction to solve problems involving partitioning
VCMNA113
Solve problems by using number sentences for addition or subtraction
VCMNA107
Solve simple addition and subtraction problems using a range of efficient mental and written strategies
VCMNA103
Investigate number sequences, initially those increasing and decreasing by twos, threes, fives and ten from any starting point, then moving to other sequences
Australian Curriculum covers QLD / SA / WA / NT / TAS / ACT.
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