# Arizona - Grade 1 - Math - Operations and Algebraic Thinking - Adding and Subtracting within 20 - 1.OA.4 , 1.OA.5 , 1.OA.6

### Description

1.OA.4 Understand subtraction as an unknown-addend problem within 20 (e.g., subtract 10 - 8 by finding the number that makes 10 when added to 8) 1.OA.5 Relate counting to addition and subtraction (e.g., by using counting on 2 to add 2). 1.OA.6 Fluently add and subtract within 10.

• State - Arizona
• Standard ID - 1.OA.4 , 1.OA.5 , 1.OA.6
• Subjects - Math Common Core
• Grade - 1

### Keywords

• Math
• Arizona grade 1
• Operations and Algebraic Thinking

## More Arizona Topics

Use addition and subtraction within 20 to solve word problems with unknowns in all positions (e.g., by using objects, drawings, and/or equations with a symbol for the unknown number to represent the problem).

Compose two-dimensional shapes or three-dimensional shapes to create a composite shape.

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/or equations with a symbol for the unknown number to represent the problem).

Count to 120 by 1's, 2's, and 10's starting at any number less than 100. In this range, read and write numerals and represent a number of objects with a written numeral.

Demonstrate understanding of addition within 100, connecting objects or drawings to strategies based on place value (including multiples of 10), properties of operations, and/or the relationship between addition and subtraction. Relate the strategy to a written form.

## Here is the skill that Arizona requires you to master

• Grade Level 1
• State Test AzMERIT
• State Standards Arizona's College and Career Ready Standards
• Subject Math
• Topic Name Adding and Subtracting within 20
• Standard ID 1.OA.4 , 1.OA.5 , 1.OA.6
• Description
1.OA.4 Understand subtraction as an unknown-addend problem within 20 (e.g., subtract 10 - 8 by finding the number that makes 10 when added to 8) 1.OA.5 Relate counting to addition and subtraction (e.g., by using counting on 2 to add 2). 1.OA.6 Fluently add and subtract within 10.