Subtraction
Program of Studies
Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating.
In what ways can the processes of addition and subtraction be articulated?
Students add and subtract within 1 000 000, including decimal numbers to thousandths, using standard algorithms.
Knowledge
Standard algorithms are efficient procedures for addition and subtraction.
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Understanding
Addition and subtraction of numbers with many digits is facilitated by standard algorithms.
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Skills and Procedures
Add and subtract numbers, including decimal numbers, using standard algorithms. Assess the reasonableness of a sum or difference using estimation. Solve problems using addition and subtraction, including problems involving money.
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