Add, subtract and multiply (with parentheses) Worksheets

These mixed operations worksheets are designed for 3rd Grade students (Ages 8-9). Print any one in the set for targeted practice, or download them together as a packet.

Yes. These worksheets work for homeschool, classroom, and tutoring. Use them as a morning warm-up, an independent center activity, or a fast-finisher task.

Third grade introduces the concept that multiplication and division are performed before addition and subtraction in an expression without parentheses (CCSS 3.OA). This is a precursor to the full order of operations (PEMDAS) formalized in fifth grade (5.OA.A.1). Third graders work with simple two-operation expressions to develop this foundational understanding.

Use concrete examples to show that order matters: 2 + 3 × 4 can equal 20 or 14 depending on which operation is done first. Show that 14 (multiply first) is the mathematically agreed-upon convention. Keep expressions simple - avoid parentheses and exponents at this level. Worksheets with step-by-step guided solutions showing which operation to solve first model the reasoning process.

Without consistent order of operations, the same expression could have different values for different people - making mathematical communication impossible. Third graders encounter this implicitly whenever they evaluate two-step word problems. Explicit instruction on the convention prepares students for the full PEMDAS rule in fifth grade and algebraic thinking in middle school.