Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

Operations and Algebraic Thinking

Add and subtract within 20.

Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

Operations and Algebraic Thinking

Add and subtract within 20.

NGA Center/CCSSO

Last updated:

2010-06-04 06:28:11

- Multiple Subjects
- Counting and Cardinality
- Number and Operations in Base 10

- Elementary (Grades K-2)

Common Core

Double sided cards with numbers 1 to 100 and their spelling. Aligned with Common Core Standards: K.CC.1, K.CC.2, K.CC.4 Counting and Cardinality; K...

- Operations and Algebraic Thinking
- Elementary (Grades K-2)

Common Core

Simple addtion exercise which tells the child if their answer is correct. This is similar to the resource already submitted; but now you can change...

- Multiple Subjects
- Fractions
- Operations and Algebraic Thinking

- K-2, 3-5

Common Core

Sheet to be used as a prompt to help the process of math problem solving. Aligned with Common Core State Standards: 1.OA.1, Operations and Algebraic...

- This standard is part of: CCSS.Math.Content.2.OA.B

Finer grained standards that are part of this one

NGA Center/CCSSO

Last updated:

2021-02-04 11:48:51

Standards with the same topic and subject but for other grades

Apply properties of operations as strategies to add and subtract.

16 lessons are aligned with this standard

NGA Center/CCSSO

Last updated:

2010-06-03 12:41:42

Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

14 lessons are aligned with this standard

NGA Center/CCSSO

Last updated:

2010-06-02 09:27:34

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

5 lessons are aligned with this standard

NGA Center/CCSSO

Last updated:

2010-06-03 12:40:50

Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.

13 lessons are aligned with this standard

NGA Center/CCSSO

Last updated:

2010-06-03 12:27:56

Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1).

11 lessons are aligned with this standard

NGA Center/CCSSO

Last updated:

2010-06-02 09:27:42

State-specific standards derived from this one

Fluently add and subtract within 20 using mental strategies. (See 1.OA.C.6 for a list of strategies.) By end of Grade 2, know from memory all sums of two one-digit numbers.

Colorado DOE

Last updated:

2018-10-08 13:54:24

Fluently add and subtract within 20 using mental strategies and by end of Grade 2, know from memory all sums of two one-digit numbers.

West Virginia DOE

Last updated:

2016-02-01 09:42:37

Maine DOE

Last updated:

2013-06-20 10:16:46

South Dakota DOE

Last updated:

2013-06-20 16:43:22

Fluently add and subtract within 20 using mental strategies.

South Dakota DOE

Last updated:

2018-05-06 21:44:00

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