Grade 3 Math
14 units matched to the Manitoba Curriculum.
Learning focus
- Number: Develop number sense.
- Patterns and Relations: Use patterns to describe the world and solve problems.
- Patterns and Relations: Represent algebraic expressions in multiple ways.
- Shape and Space: Use direct or indirect measurement to solve problems.
- Shape and Space: Describe the characteristics of 3-D objects and 2-D shapes, and analyze the relationships among them.
- Statistics and Probability: Collect, display, and analyze data to solve problems.
Units
Unit 1
Numbers to 1000
Reading, building, comparing and ordering numbers to 1000 as hundreds, tens and ones, including tricky zeros and regrouping (12 tens is 1 hundred and 2 tens).
Learning outcome: 3.N.1, 3.N.2, 3.N.3, 3.N.5 · counting, representing, comparing and ordering numbers to 1000, and place value
Unit 2
Round & Count
Rounding numbers to the nearest ten or hundred, counting forward and back by 50s, 100s and 200s, and comparing and ordering numbers up to 1000.
Learning outcome: 3.N.4, 3.N.8 · estimating quantities and sums and differences
Unit 3
Facts to 20
Building fast, flexible recall of addition and subtraction facts to 20 with strategies like making ten, near doubles, fact families and thinking addition to subtract.
Learning outcome: 3.N.10 · mental math strategies for addition facts and related subtraction facts
Unit 4
Add & Subtract
Adding and subtracting 2- and 3-digit numbers by place value, number-line jumps and counting up, plus estimating by rounding to the nearest hundred.
Learning outcome: 3.N.6, 3.N.7, 3.N.9 · adding and subtracting 2-digit and 3-digit numbers
Unit 5
Multiplication
Understanding multiplication as equal groups, arrays, repeated addition and skip counting. Easier sets use 2s, 5s and 10s; stretch sets go beyond 5 × 5.
Learning outcome: 3.N.11 · multiplication as repeated addition, arrays and equal groups
Unit 6
Division
Understanding division as sharing fairly and as making equal groups, and using multiplication facts to divide (3 × 4 = 12, so 12 ÷ 3 = 4).
Learning outcome: 3.N.12 · division as sharing and grouping
Unit 7
Fractions
Naming fractions of a shape, a set and a number line, knowing what the top and bottom numbers mean, and comparing fractions by the size of their parts.
Learning outcome: 3.N.13 · fractions as parts of a whole or a set
Unit 8
Patterns & Equations
Extending increasing and decreasing patterns, describing pattern rules in words and tables, and solving one-step equations like ☐ + 8 = 23.
Learning outcome: 3.PR.1, 3.PR.2, 3.PR.3 · increasing and decreasing patterns, and one-step equations with a symbol
Unit 9
Time
Telling time on an analog clock, working out start and end times, and knowing how seconds, minutes, hours, days, weeks, months and years relate.
Learning outcome: 3.SS.1, 3.SS.2 · the passage of time, and seconds, minutes, hours, days and months
Unit 10
Measuring
Measuring with centimetres and metres, grams and kilograms, millilitres and litres: choosing sensible units, estimating, comparing and solving measurement problems.
Learning outcome: 3.SS.3, 3.SS.4 · measuring length in cm and m, and mass in g and kg
Unit 11
Area & Perimeter
Finding the perimeter (distance around) of rectangles and triangles, finding a missing side, and measuring area in square centimetres and square metres.
Learning outcome: 3.SS.5 · perimeter of regular and irregular shapes
Unit 12
3D Objects
Naming 3D objects, counting their faces, edges and vertices, and thinking about how they are built from flat faces or from straws and clay.
Learning outcome: 3.SS.6 · describing 3-D objects by their faces and edges
Unit 13
Sorting Polygons
Practises naming polygons by their number of sides and sorting them as regular (all sides and angles equal) or irregular.
Learning outcome: 3.SS.7 · sorting regular and irregular polygons by the number of sides
Unit 14
Graphs & Chance
Reading pictographs and bar graphs where one symbol can stand for one vote or several, and describing how likely outcomes are with spinners, marbles and number cubes.
Learning outcome: 3.SP.1, 3.SP.2 · collecting data and reading bar graphs
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