Math Games

Grade 1 - Number

Standard 1.N.9 - Identify subtraction sentences with objects up to 8.

Included Skills:

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
• modeling addition and subtraction using a variety of concrete and visual representations, and recording the process symbolically.

• Achievement Indicators
• Students who have achieved this outcome(s) should be able to:
- Act out a given story problem presented orally or through shared reading.
- Indicate if the scenario in a given story problem represents additive and/or subtractive action.
- Represent the numbers and actions presented in a given 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 word problem for a given number sentence.
- Represent a given story problem pictorially or symbolically to show the additive and/or subtractive action and solve the problem.