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STANDARDS

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US-TN

Math

Tennessee Math

Grade 1: Operations and Algebraic Thinking (OA)

1.OA.A

Represent and solve problems involving addition and subtraction.

1.OA.A.1

Fully covered
Add and subtract within 20 to solve contextual problems, with unknowns in all positions, involving situations of add to, take from, put together/take apart, and compare. Use objects, drawings, and equations with a symbol for the unknown number to represent the problem. NOTE: While start unknown situations may be introduced in first grade, they are not expected to be mastered until second grade.

1.OA.A.2

Fully covered
Add three whole numbers whose sum is within 20 to solve contextual problems using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

1.OA.B

Understand and apply properties of operations and the relationship between addition and subtraction.

1.OA.B.3

Not covered
Apply properties of operations (additive identity, commutative, and associative) as strategies to add and subtract. (Students need not use formal terms for these properties.)
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1.OA.B.4

Partially covered
Understand the relationship between addition and subtraction by representing subtraction as an unknown-addend problem. For example, to solve 10 – 8 = __, a student can use 8 + __ = 10.

1.OA.C

Add and subtract within 20.

1.OA.C.5

Mostly covered
Add and subtract within 20 using strategies such as counting on, counting back, making 10, related known facts, and composing/decomposing numbers with an emphasis on making ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9 or adding 6 + 7 by creating the known equivalent 6 + 4 + 3 = 10 + 3 = 13 OR 6 + 6 + 1 = 12 + 1).

1.OA.C.6

Partially covered
Use mental strategies flexibly and efficiently to develop fluency in addition and subtraction within 20. By the end of grade 1, know all sums and differences up to 10.

1.OA.D

Work with addition and subtraction equations.

1.OA.D.7

Not covered
Understand the meaning of the equal sign (e.g., 6 = 6; 5 + 2 = 4 + 3; 7 = 8 – 1). Determine if equations involving addition and subtraction are true or false.
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1.OA.D.8

Not covered
Determine the unknown whole number in an addition or subtraction equation with sums/differences within 20, with the unknown in any position (e.g., 8 + ? = 11, 5 = ? – 3, 6 + 6 = ?).
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