Addition and Subtraction Outcomes for Grade 1
Outcome N9
Demonstrate an understanding of addition of numbers with answers to 20 and their corresponding subtraction facts, concretely, pictorially and symbolically by: using familiar and mathematical language to describe additive and subtractive actions from their experience; creating and solving problems in context that involve addition and subtraction; modelling addition and subtraction using a variety of concrete and visual representations, and recording the process symbolically.
NOTE: This outcome usually assesses sums to 12 and their corresponding subtraction facts FIRST, then sums to 20 and their corresponding subtraction facts.
Outcome Building Blocks
Building Block A: Represent a given addition story problem by modelling it (concretely), describing it through a sketch (pictorially) and writing a number sentence (symbolically)
Building Block B: Represent a given subtraction story problem by modelling it (concretely), describing it through a sketch (pictorially) and writing a number sentence (symbolically)
Building Block C: Indicate if the scenario in a given story problem represents addition and/or subtraction
Building Block D: Solve different types of problems in context that involve addition concretely, pictorially, and symbolically: see N9 Elaboration page 38 of curriculum document. (Note: Students may solve problem first concretely and pictorially before recording it symbolically)
Building Block E: Solve separating (take away) AND comparison subtraction problems in context concretely, pictorially, and symbolically (Note: Students may solve problem first concretely and pictorially before recording it symbolically)
Building Block F: Create a story problem for addition that connects to student experience
Building Block G: Create a story problem for subtraction that connects to student experience
Building Block H: Create a word problem for a given number sentence
Outcome N10
Describe and use mental mathematics strategies (memorization not intended), such as: counting on and counting back; making 10; doubles; using addition to subtract for the basic addition and subtraction facts to 18.
Outcome Building Blocks
Building Block A: Use and describe counting on and counting back to determine sums and differences (Note: counting on/counting back should be limited to 1-3 in order to be efficient)
Building Block B: Use and describe making 10 to determine sums and differences
Building Block C: Use and describe doubles to determine sums and differences
Building Block D: Use addition to determine differences
Building Block E: Use and describe a personal mental math strategy for determining a given sum
Building Block F: Use and describe a personal mental math strategy for determining a given difference
Building Block G: Demonstrate an understanding of related addition and subtraction facts
Demonstrate an understanding of addition of numbers with answers to 20 and their corresponding subtraction facts, concretely, pictorially and symbolically by: using familiar and mathematical language to describe additive and subtractive actions from their experience; creating and solving problems in context that involve addition and subtraction; modelling addition and subtraction using a variety of concrete and visual representations, and recording the process symbolically.
NOTE: This outcome usually assesses sums to 12 and their corresponding subtraction facts FIRST, then sums to 20 and their corresponding subtraction facts.
Outcome Building Blocks
Building Block A: Represent a given addition story problem by modelling it (concretely), describing it through a sketch (pictorially) and writing a number sentence (symbolically)
Building Block B: Represent a given subtraction story problem by modelling it (concretely), describing it through a sketch (pictorially) and writing a number sentence (symbolically)
Building Block C: Indicate if the scenario in a given story problem represents addition and/or subtraction
Building Block D: Solve different types of problems in context that involve addition concretely, pictorially, and symbolically: see N9 Elaboration page 38 of curriculum document. (Note: Students may solve problem first concretely and pictorially before recording it symbolically)
Building Block E: Solve separating (take away) AND comparison subtraction problems in context concretely, pictorially, and symbolically (Note: Students may solve problem first concretely and pictorially before recording it symbolically)
Building Block F: Create a story problem for addition that connects to student experience
Building Block G: Create a story problem for subtraction that connects to student experience
Building Block H: Create a word problem for a given number sentence
Outcome N10
Describe and use mental mathematics strategies (memorization not intended), such as: counting on and counting back; making 10; doubles; using addition to subtract for the basic addition and subtraction facts to 18.
Outcome Building Blocks
Building Block A: Use and describe counting on and counting back to determine sums and differences (Note: counting on/counting back should be limited to 1-3 in order to be efficient)
Building Block B: Use and describe making 10 to determine sums and differences
Building Block C: Use and describe doubles to determine sums and differences
Building Block D: Use addition to determine differences
Building Block E: Use and describe a personal mental math strategy for determining a given sum
Building Block F: Use and describe a personal mental math strategy for determining a given difference
Building Block G: Demonstrate an understanding of related addition and subtraction facts