Mathematics, Grade 3

Unit 1: Number

Skip-counting and numbers to 1000, place value, mental addition and subtraction, addition and subtraction to 1000, first multiplication and division, and first fractions.

• Skip-counting by 5s, 10s, and 100s
• Skip-counting by 3s, 4s, and 25s
• Showing numbers to 1000
• Comparing and ordering to 1000
• Estimating quantities to 1000
• Hundreds, tens, and ones

• Adding two 2-digit numbers mentally
• Subtracting two 2-digit numbers mentally
• Estimating sums and differences
• Adding numbers to 1000
• Subtracting numbers to 1000
• Doubles and making 10 for facts
• The commutative and zero properties
• Thinking addition to subtract

• Multiplication as equal groups and arrays
• Multiplication facts to 5 by 5
• Division as sharing and grouping
• Relating division to multiplication
• A fraction is part of a whole
• Where fractions are used
• Comparing fractions with the same bottom number

Unit 2: Patterns and Relations

Increasing and decreasing patterns, and solving one-step addition and subtraction equations with an unknown.

• Increasing patterns
• Decreasing patterns

• Missing-number addition equations
• Missing-number subtraction equations

Unit 3: Shape and Space

Time, measuring length and mass, perimeter, describing 3-D objects, and sorting polygons.

• Relating time to activities
• Seconds, minutes, and days

• Choosing referents for cm and m
• How centimetres and metres relate
• Estimating length
• Measuring and recording length
• Measuring mass (g and kg)

• Perimeter of regular shapes
• Perimeter of irregular shapes
• Describing 3-D objects by their faces
• Counting edges and vertices
• Sorting polygons by their sides

Unit 4: Statistics and Probability

Collecting and organizing first-hand data, and building and reading bar graphs.

• Organizing data with tallies and line plots
• Organizing data with charts and lists
• Building and reading bar graphs