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Colorado - Grade 1 - Math - Operations and Algebraic Thinking - Number Sentences - 1.OA.7 , 1.OA.8

Description

1.OA.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2. 1.OA.8 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.

Additional Info

  • State - Colorado
  • Standard ID - 1.OA.7 , 1.OA.8
  • Subjects - Math Common Core
  • Grade - 1

Keywords

  • Math
  • Colorado grade 1
  • Operations and Algebraic Thinking

More Colorado Topics

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

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.

Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.

Here is the skill that Colorado requires you to master

  • Grade Level 1
  • State Test CMAS PARCC
  • State Standards The Colorado Public Standards (CAS)
  • Subject Math
  • Topic Name Number Sentences
  • Standard ID 1.OA.7 , 1.OA.8
  • Description
    1.OA.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2. 1.OA.8 Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ – 3, 6 + 6 = _.

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Colorado schools will administer the CMAS PARCC assessments

Colorado schools will administer the CMAS PARCC assessments to measure student proficiency of the Colorado Academic Standards (CAS). Education Galaxy’s CMAS PARCC test preparation program provides online assessment and practice for students in Grades K-5 to help build mastery towards the Colorado Academic Standards. Our unique online program is easy to use and enjoyable for both teachers and students. Students work on their Study Plans practicing important concepts while teachers pull formative assessment reports to identify the strengths and weaknesses of their classroom and individual students.