Grade 1 - Number
Standard 1.N.9 - Identify subtraction sentences with objects up to 10.
Included Skills: Subtraction
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 • Act out a story problem presented orally or through shared reading. • Indicate if the scenario in a story problem represents additive or subtractive action. • Represent the numbers and actions presented in a story problem by using manipulatives, and record them using sketches and/or number sentences. • Create a story problem for addition that connects to student experience, and simulate the action with counters. • Create a story problem for subtraction that connects to student experience, and simulate the action with counters. • Create a story problem for a number sentence. • Represent a story problem pictorially or symbolically to show the additive or subtractive action, and solve the problem.