Whats the Addition Subtraction Rule Worksheet
This Whats the Addition Subtraction Rule Worksheet gives 3rd graders six IN/OUT tables to solve, two word problems, and space to write each rule. An answer key is included.
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About this resource
Description
Function tables are where third graders first meet the idea that a pattern can be written as a rule. This Whats the Addition Subtraction Rule Worksheet puts that idea in front of them six times over. Each card holds a small IN/OUT table built on a single addition or subtraction rule, and the student’s job is to look across the rows, work out what is happening to every IN number, write the rule on the line, and then use it to fill in the one OUT number that is missing.
The rules run from +7 all the way to −20, and the numbers stay inside the 0–100 range third graders work in, so students practice mental addition and subtraction while they hunt for the pattern. Three cards use addition and three use subtraction, and they alternate, so nobody can coast through by assuming the last rule still applies. A short Part B then takes the same thinking into two word problems, where students name the rule before they give the answer. Page two is the complete answer key, so this Whats the Addition Subtraction Rule Worksheet is ready to print and hand out.
What’s Included
- Six IN/OUT function tables, three addition and three subtraction
- A Rule line inside every card for the student to complete
- One missing OUT value per table, found by applying the rule
- Two word problems that ask for the rule and the answer
- A complete answer key on page two
Three Reasons This Helps Kids
- It turns a pattern into a rule. Naming the rule in words is the step that carries students from arithmetic into early algebraic thinking, and it is exactly what 3.OA.D.9 asks for.
- It builds fact fluency without a drill sheet. Every table quietly rehearses four addition or subtraction facts, but the student is solving a puzzle rather than copying a column.
- Mixing the operations forces real reading. Because addition and subtraction tables alternate, students must check the direction of the change on every card instead of repeating a habit.
Teacher and Parent Ideas
- Work card one together as a model, saying the rule aloud before writing it.
- Have students add a fifth IN number of their own to a table and predict its OUT value.
- Use this 3rd grade patterns worksheet as a warm-up, a math-centre task, or a quick check after a function-table lesson.
- Challenge early finishers to write a brand-new table for a partner to solve.
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