Solve Equations
1st Grade


Alabama Course of Study Standards:
1

Use addition and subtraction to solve word problems within 20 by using concrete objects, drawings, and equations
with a symbol for the unknown number to represent the problem. Add to with change unknown to solve word problems within 20.
 Take from with change unknown to solve word problems within 20.
 Put together/take apart with addend unknown to solve word problems within 20.
 Compare quantities, with difference unknown, bigger unknown, and smaller unknown while solving word
problems within 20.

Arkansas Academic Standards:
1.OA.A.1

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) 
Arizona  K12 Academic Standards:
1.OA.A.1

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). See Table 1 
Common Core State Standards:
1.OA.A.1

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. 
Georgia Standards of Excellence (GSE):
1.NR.2.1

Use a variety of strategies to solve addition and subtraction problems within 20. 
Massachusetts Curriculum Frameworks:
1.OA.A.1

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 (number sentences) with a symbol for the unknown number to represent the problem.^{5} 
North Carolina  Standard Course of Study:
1.OA.1

Represent and solve addition and subtraction word problems, within 20, with unknowns, by using objects, drawings, and equations with a
symbol for the unknown number to represent the problem, when solving:
Add to/Take fromChange Unknown

Put together/Take ApartAddend Unknown

CompareDifference Unknown

New York State Next Generation Learning Standards:
1.OA.1

Use addition and subtraction within 20 to solve one step word problems involving situations of adding to, taking from, putting together, taking apart, and/or comparing, with unknowns in all positions.
Note: Problems should be represented using objects, drawings, and equations with a symbol for the unknown number. Problems should be solved using objects or drawings, and equations. 
Ohio's Learning Standards:
1.OA.1

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. See Table 1, page 94. 
Tennessee Academic Standards:
1.OA.A.1

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. (See Table 1  Addition and Subtraction Situations) 
Alabama Course of Study Standards:
8

Solve for the unknown whole number in various positions in an addition or subtraction equation, relating three
whole numbers that would make it true.
Example: determining the unknown number that makes the equation true in each of the equations 8 + ? = 11,
5 = ? – 3, and 6 + 6 = ? 
Arkansas Academic Standards:
1.OA.D.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, and 6 + 6 = _ 
Arizona  K12 Academic Standards:
1.OA.D.8

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers (e.g., determine the unknown number that makes the equation true in each of the equations 8 + = 11, 5 =  3, 6 + 6 = ). 
Common Core State Standards:
1.OA.D.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 = _. 
Georgia Standards of Excellence (GSE):
1.NR.2.6

Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. 
North Carolina  Standard Course of Study:
1.OA.8

Determine the unknown whole number in an addition or subtraction equation involving three whole numbers. 
New York State Next Generation Learning Standards:
1.OA.8

Determine the unknown whole number in an addition or subtraction equation with the unknown in all positions. Determine the unknown number that makes the equation
true in each of the equations: 8 + ? = 11, 5 = _  3, 6 + 6 = _. 
Tennessee Academic Standards:
1.OA.D.8

Determine the unknown whole number in an addition or subtraction equation, with the unknown in any position (e.g., 8 + ? = 11, 5 = ?  3, 6 + 6 = ?). 
Florida  Benchmarks for Excellent Student Thinking:
MA.1.AR.1.2

Solve addition and subtraction realworld problems using objects, drawings or equations to represent the problem. 
Georgia Standards of Excellence (GSE):
1.NR.2.6

Determine the unknown
whole number in an
addition or subtraction
equation relating to three
whole numbers. 
