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This Mixed All Operations drill has 48 problems for Grade 3. Beach theme. Answer key included.
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Max discovered a mysterious map! He must solve every equation to find the buried treasure before the tide rises.
Standard: CCSS.MATH.3.OA.D.8
Preview
Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 3 Mixed All Operations Drill
By Grade 3, students need to fluently solve problems that mix addition, subtraction, multiplication, and division in a single expression. This skill is crucial because real-world situations rarely involve just one operation—figuring out how much change you get at the beach concession stand, or splitting a pizza among friends, requires students to know which operation to use and in what order. At ages 8–9, children's brains are developing the ability to hold multiple steps in mind simultaneously, making this the ideal time to build this foundational competency. Mastering mixed-all-operations strengthens their number sense, builds confidence with all four operations, and prepares them for the more complex problem-solving they'll encounter in upper grades. Students who practice these problems learn to think strategically rather than rushing through calculations.
What your student will practice
- Solve two-step problems using different operations in correct sequence
- Identify which operation to use based on problem language and context
- Apply order of operations thinking (doing one operation at a time)
- Build automaticity with fact fluency across all four operations
Common mistakes to watch for
The most common error is that students perform operations left-to-right without thinking about what the problem actually asks. For example, when solving 12 ÷ 3 + 2, they might compute 12 ÷ 3 = 4, then correctly add 2 to get 6—but they often rush and skip the second step entirely, writing just 4. Another frequent mistake is reversing the operation based on a keyword alone: seeing the word 'left' in a subtraction problem and subtracting when they should add, or vice versa. Watch for students who solve the first operation correctly but abandon the problem halfway through, or who change operations midway without reason.
Create a simple two-step shopping scenario at home: pick an item from a pantry shelf, write down its price, then ask your child to find another item and calculate the total cost, then figure out change from a five-dollar bill. This requires them to add (find total), then subtract (find change)—exactly like a mixed-operations problem, but with real money and items they can touch. Repeat this weekly with different combinations so they build both operation fluency and confidence in applying math to everyday choices.