Explore the world of addition and subtraction with this unit plan aimed at students in Year 3. Students will learn to add and subtract two- and three-digit numbers using place value, part-part-whole models, and proportional models. They will understand the relationship between addition and subtraction and make informed choices about partitioning and regrouping numbers to solve problems.
The unit contains a step-by-step presentation, posters, worksheets, a quiz, and games. At the completion of the unit, an assessment has been included to monitor student understanding.
Add and subtract two- and three-digit numbers using place value to partition, rearrange and regroup numbers to assist in calculations without a calculator
Apply place value to partition, rearrange and regroup numbers to at least 10 000 to assist calculations and solve problems
Apply place value to partition, rearrange and regroup numbers to at least 10 000 to assist calculations and solve problems
Uses appropriate terminology to describe, and symbols to represent, mathematical ideas
Selects and uses appropriate mental or written strategies, or technology, to solve problems
Checks the accuracy of a statement and explains the reasoning used
Applies place value to order, read and represent numbers of up to five digits
Applies an understanding of place value and the role of zero to represent numbers to at least tens of thousands
Represents and compares decimals up to 2 decimal places using place value
Selects and uses mental and written strategies for addition and subtraction involving 2- and 3-digit numbers
Completes number sentences involving addition and subtraction by finding missing values