Mathematics, Grade 3

Unit 1: Number

Skip-counting and numbers to 1000, place value, mental-math addition and subtraction, estimation, first multiplication and division to 5x5, and first fractions.

• Counting by 1s through the tricky spots
• Skip-counting by 2s, 5s, 10s, and 100s
• Skip-counting by 3s, 4s, and 25s

• Showing and reading numbers to 1000
• Breaking numbers into hundreds, tens, and ones
• Comparing and ordering to 1000
• Place value to 1000
• Equivalent ways to show a number
• Estimating amounts to 1000

• Mental strategies for adding
• Mental strategies for subtracting
• Estimating sums and differences
• Personal strategies for adding and subtracting to 1000
• Making and solving addition and subtraction stories
• Quick recall of addition facts
• Quick recall of subtraction facts

• Multiplication as equal groups
• Multiplication with arrays
• Multiplication as repeated addition and story problems
• How multiplication and division connect

• Division as equal sharing
• Division as equal grouping
• Division as repeated subtraction
• Connecting division to multiplication

• Fractions as part of a whole
• Comparing fractions with the same bottom number

Unit 2: Patterns and Relations

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

• Describing and extending increasing patterns
• Creating increasing patterns
• Describing and extending decreasing patterns
• Creating decreasing patterns

• Solving equations with an unknown

Unit 3: Measurement

The passage of time in standard units, length in centimetres and metres, mass in grams and kilograms, and perimeter.

• The passage of time
• How time units fit together

• Centimetres and metres and how they relate
• Estimating and measuring length
• Grams and kilograms and how they relate
• Estimating and measuring mass

• Measuring perimeter
• Many shapes, same perimeter

Unit 4: Geometry

Describing 3-D objects by the shape of their faces, and naming, describing, comparing, creating, and sorting polygons.

• Describing 3-D objects by their faces
• Naming and describing polygons
• Comparing, creating, and sorting polygons

Unit 5: Statistics and Probability

Collecting and organizing first-hand data and constructing and interpreting bar graphs.

• Collecting and organizing data
• Building and reading bar graphs