Grade 1

It is essential that these standards be addressed in contexts that promote problem solving, reasoning, communication, making connections, and designing and analyzing representations.
Problem Solving Links

1.2 Number and Operations and Algebra: Develop understandings of addition and subtraction and strategies for basic addition facts and related subtraction facts.
Basic +/- Facts Club   

1.2.1 Model “part-whole,” “adding to,” “taking away from,” and

comparing” situations to develop an understanding of the meanings

of addition and subtraction.

1.2.2 Develop and use efficient strategies for adding and subtracting

whole numbers using a variety of models, including discrete objects,

length-based models (e.g., lengths of connecting cubes) and

number lines.

1.2.3 Apply with fluency sums to 10 and related subtraction facts.

1.2.4 Use the concept of commutative [4 + 2 = 2 + 4], associative [(4 + 3)

+ 7 = 4 + (3 + 7)], and identity [0 + 3 = 3] properties of addition to

solve problems involving basic facts.

1.2.5 Relate addition and subtraction as inverse operations.

1.2.6 Identify, create, extend, and supply a missing element in number

patterns involving addition or subtraction by a single-digit number.

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