Grade 1 - Number
Standard 1.N.9 - Write a subtraction sentence to represent the word problem with numbers up to 18.
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 mathematical language to describe additive and subtractive actions. • 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 given problem presented orally or through shared reading. • Indicate if the scenario in a given problem represents additive or subtractive action. • Represent the numbers and actions presented in a given problem by using manipulatives, and record them using sketches and/or number sentences. • Create an addition problem based on personal experiences, and simulate the action with counters. • Create a subtraction problem based on personal experiences, and simulate the action with counters. • Create a word problem for a given number sentence (equation). • Represent a given problem pictorially or symbolically to show the additive or subtractive action, and solve the problem.