Public learning track
Properties of Addition and Mental Strategies
1st Grade · Math · Open Global Math
8 lessons
Goal
Apply the commutative, associative, and identity properties to calculate sums within 20 and up to 100.
Featured Diagrams
Order Doesnt Matter When Adding
8 lessons
0 of 8 done
- 1Order Doesnt Matter When AddingUp nextStart
- 2Applying the Turnaround Rule to Add FasterPremiumNot started yet
- 3Generalising About Adding Zero and Taking Away ZeroNot started yet
- 4Grouping Numbers When AddingNot started yet
- 5Adding Three Numbers by Making TenNot started yet
- 6Adding Three Numbers by Finding DoublesNot started yet
- 7Adding Three Two-Digit Numbers Within 100Not started yet
- 8Explaining Addition Strategies with PropertiesNot started yet
Curriculum Framework
1st Grade · Math · Open Global Math
1
12 lessons
Addition and Subtraction Fact Strategies Within 20
Master addition and subtraction facts within 10 and develop flexible mental strategies within 20.
2
8 lessons
Properties of Addition and Mental Strategies
Apply the commutative, associative, and identity properties to calculate sums within 20 and up to 100.
3
8 lessons
Fact Families and Part-Whole Relationships
Connect addition and subtraction through fact families, bar models, and balance scales.
4
8 lessons
Understanding Equivalence and Equations
Understand the equal sign as balance, evaluate true/false equations, and solve missing-number equations in all positions.
5
9 lessons
Word Problems: Addition and Subtraction Within 100
Solve one-step and two-step addition and subtraction word problems across various situation types within 20 and extending to 100.
6
9 lessons
Equal Groups, Arrays, and Early Multiplication
Build multiplication and division concepts through equal groups, repeated addition, equal sharing, and rectangular arrays.
7
8 lessons
Repeating, Growing, and Cyclical Patterns
Identify, describe, extend, and create repeating, growing, and cyclical patterns using shapes, objects, sounds, and numbers.