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Grade 3 - Patterns and Relations

Standard 3.PR.3 - Practice using addition and subtraction to solve for a variable.

Included Skills:

Solve one-step addition and subtraction equations involving symbols representing an unknown number.
Achievement Indicators
Students who have achieved this outcome(s) should be able to:
- Explain the purpose of the symbol, such as a triangle or a circle, in a given addition and in a given subtraction equation with one unknown.
- Create an addition or subtraction equation with one unknown to represent a given combination or separation action.
- Provide an alternative symbol for the unknown in a given addition or subtraction equation.
- Solve a given addition or subtraction equation that represents combining or separating actions with one unknown using manipulatives.
- Solve a given addition or subtraction equation with one unknown using a variety of strategies including guess and test.
- Explain why the unknown in a given addition or subtraction equation has only one value.

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