Grade 3 Math Courses - Ontario Curriculum

Discover Ontario's Grade 3 math curriculum, covering essential topics like number sense, measurement, geometry, and data management. Build a strong foundation for future mathematical success.

Ontario Grade 3 Math Curriculum - Comprehensive Guide

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OE_ID
Expectations
StudyPug Topic
ON.OE.3.B.1.1
B1.1 Whole Numbers: read, represent, compose, and decompose whole numbers up to and including 1000, using a variety of tools and strategies, and describe various ways they are used in everyday life
ON.OE.3.B.1.2
B1.2 Whole Numbers: compare and order whole numbers up to and including 1000, in various contexts
ON.OE.3.B.1.3
B1.3 Whole Numbers: round whole numbers to the nearest ten or hundred, in various contexts

Rounding numbers

intro
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video
ON.OE.3.B.1.5
B1.5 Whole Numbers: use place value when describing and representing multi-digit numbers in a variety of ways, including with base ten materials
ON.OE.3.B.1.7
B1.7 Fractions: represent and solve fair-share problems that focus on determining and using equivalent fractions, including problems that involve halves, fourths, and eighths; thirds and sixths; and fifths and tenths

Equivalent fractions

intro
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ON.OE.3.B.2.1
B2.1 Properties and Relationships: use the properties of operations, and the relationships between multiplication and division, to solve problems and check calculations
ON.OE.3.B.2.2
B2.2 Math Facts: recall and demonstrate multiplication facts of 2, 5, and 10, and related division facts
ON.OE.3.B.2.3
B2.3 Mental Math: use mental math strategies, including estimation, to add and subtract whole numbers that add up to no more than 1000, and explain the strategies used
ON.OE.3.B.2.4
B2.4 Addition and Subtraction: demonstrate an understanding of algorithms for adding and subtracting whole numbers by making connections to and describing the way other tools and strategies are used to add and subtract
ON.OE.3.B.2.5
B2.5 Addition and Subtraction: represent and solve problems involving the addition and subtraction of whole numbers that add up to no more than 1000, using various tools and algorithms
ON.OE.3.B.2.6
B2.6 Multiplication and Division: represent multiplication of numbers up to 10 × 10 and division up to 100 ÷ 10, using a variety of tools and drawings, including arrays
ON.OE.3.B.2.7
B2.7 Multiplication and Division: represent and solve problems involving multiplication and division, including problems that involve groups of one half, one fourth, and one third, using tools and drawings
ON.OE.3.B.2.8
B2.8 Multiplication and Division: represent the connection between the numerator of a fraction and the repeated addition of the unit fraction with the same denominator using various tools and drawings, and standard fractional notation
ON.OE.3.B.2.9
B2.9 Multiplication and Division: use the ratios of 1 to 2, 1 to 5, and 1 to 10 to scale up numbers and to solve problems
ON.OE.3.C.2.1
C2.1 Variables: describe how variables are used, and use them in various contexts as appropriate
ON.OE.3.C.2.2
C2.2 Equalities and Inequalities: determine whether given sets of addition, subtraction, multiplication, and division expressions are equivalent or not
ON.OE.3.C.2.3
C2.3 Equalities and Inequalities: identify and use equivalent relationships for whole numbers up to 1000, in various contexts
ON.OE.3.D.1.1
D1.1 Data Collection and Organization: sort sets of data about people or things according to two and three attributes, using tables and logic diagrams, including Venn, Carroll, and tree diagrams, as appropriate
ON.OE.3.D.1.4
D1.4 Data Analysis: determine the mean and identify the mode(s), if any, for various data sets involving whole numbers, and explain what each of these measures indicates about the data
ON.OE.3.E.2.7
E2.7 Area: compare the areas of two-dimensional shapes by matching, covering, or decomposing and recomposing the shapes, and demonstrate that different shapes can have the same area
ON.OE.3.E.2.8
E2.8 Area: use appropriate non-standard units to measure area, and explain the effect that gaps and overlaps have on accuracy

Square measure

intro
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ON.OE.3.E.2.9
E2.9 Area: use square centimetres (cm2) and square metres (m2) to estimate, measure, and compare the areas of various two-dimensional shapes, including those with curved sides
ON.OE.3.F.1.1
F1.1 Money Concepts: estimate and calculate the change required for various simple cash transactions involving whole-dollar amounts and amounts of less than one dollar

Ontario Grade 3 Math FAQ

We’ve got answers to some popular questions.
What are the main topics covered in Ontario's Grade 3 math curriculum?

Ontario's Grade 3 math curriculum covers number sense and numeration, measurement, geometry and spatial sense, patterning and algebra, and data management and probability.

How can I support my child's Grade 3 math learning at home?

Support your child by practicing math in daily activities, using manipulatives, playing math games, and reviewing homework. Encourage problem-solving and positive attitudes towards math.

What math skills should a Grade 3 student have by the end of the year?

By year-end, Grade 3 students should comfortably work with numbers to 1000, understand basic fractions, tell time, measure length, identify 2D and 3D shapes, and interpret simple data.

Are there standardized tests for Grade 3 math in Ontario?

Yes, Grade 3 students in Ontario typically take the EQAO (Education Quality and Accountability Office) assessment, which includes a math component aligned with the curriculum.

How does the Grade 3 math curriculum prepare students for Grade 4?

Grade 3 math builds foundational skills in number operations, problem-solving, and basic geometry, providing a solid base for the more complex concepts introduced in Grade 4.