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 the corresponding subtraction facts, concretely, pictorially, physically, 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 involving addition that connects to personal experience and simulate the action with counters. • Create a story problem involving subtraction that connects to personal experience and simulate the action with counters. • Create a word problem for a whole number addition or subtraction sentence. • Represent a story problem pictorially or symbolically to show the additive or subtractive action and solve the problem.