Use the properties of adding and subtracting, and how one undoes the other, to solve problems and check answers.
Standards are described in our own words. Ontario repeats its expectation codes in every grade, so ours put the grade first: 3.B1.2 is Grade 3’s B1.2, and K.A6.1 is Kindergarten’s A6.1. Read the official Ontario document.
© Queen’s Printer for Ontario, 2020 (Grades 1–8 Mathematics) and King’s Printer for Ontario, 2026 (Kindergarten). Codes from the Ontario curriculum; descriptions rewritten in our own words. The Ontario Ministry of Education does not endorse this site.
Tell us what would help your class practice it.
Each worksheet is matched to the skills it practices, and this standard to the skills it asks for. Everything here shares at least one of them. All of it is free to print and use.
