# Kentucky - Grade 1 - Math - Operations and Algebraic Thinking - Adding Three Whole Numbers - KY.1.OA.2

### Description

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

• State - Kentucky
• Standard ID - KY.1.OA.2
• Subjects - Math Common Core
• Grade - 1

### Keywords

• Math
• Kentucky grade 1
• Operations and Algebraic Thinking

## More Kentucky Topics

Understand the two-digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: a. 10 can be thought of as a bundle of ten ones — called a “ten.” b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight or nine ones. c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight or nine tens (and 0 ones).

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.

Apply properties of operations as strategies to add and subtract.

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

Distinguish between defining attributes versus non-defining attributes; build and draw shapes to possess defining attributes.

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

• Grade Level 1
• State Test K-PREP
• State Standards Kentucky Core Academic Standards
• Subject Math
• Topic Name Adding Three Whole Numbers
• Standard ID KY.1.OA.2
• Description
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, by using objects, drawings and equations with a symbol for one unknown number to represent the problem.