Mentally multiply whole numbers by 0.1 and 0.01, estimate sums and differences of decimals, and explain the strategy.
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.
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