Grade 3 - Patterns and Relations
Standard 3.PR.3 - Practice using addition and subtraction to solve for a variable.
Included Skills: Mixed Equations, Algebra
Solve one-step addition and subtraction equations involving a symbol to represent an unknown number. • Achievement Indicators: - 3PR3.1 Explain the purpose of the symbol in a given addition or subtraction equation with one unknown. - 3PR3.2 Create an addition or subtraction equation with one unknown to represent a given combining or separating action. - 3PR3.3 Provide an alternative symbol for the unknown in a given addition or subtraction equation. - 3PR3.4 Solve a given addition or subtraction equation with one unknown that represents combining or separating actions, using manipulatives. - 3PR3.5 Solve a given addition or subtraction equation with one unknown, using a variety of strategies, including guess and check. - 3PR3.6 Solve a given addition or subtraction equation when the unknown is on the left or the right side of the equation. - 3PR3.7 Explain why the unknown in a given addition or subtraction equation has only one value.