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This Mixed Add Subtract drill has 40 problems for Grade 2. Solar Panels theme. Answer key included.
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Max discovered loose solar panels during a windstorm! He must collect and count all 47 panels before nightfall.
Standard: CCSS.MATH.2.OA.B.2
Preview
Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 2 Mixed Add Subtract Drill
At age 7 and 8, children are building the mental flexibility to handle problems that shift between addition and subtraction within the same set of numbers. Mixed-add-subtract drills teach students to read carefully, recognize whether they're combining or taking away, and hold multiple operations in mind—skills essential for real-world math like managing pocket money, combining toys from different collections, or calculating remaining snacks after sharing. This cognitive demand strengthens working memory and prevents the common mistake of defaulting to just one operation. Mastering this skill now creates a foundation for multi-step word problems and algebraic thinking in later grades. When students can confidently solve 8 + 5 – 3 or 12 – 4 + 2, they're proving they understand numbers are flexible and can be manipulated in different ways, not just in predictable patterns.
What your student will practice
- Solve mixed-add-subtract problems with sums and differences within 20
- Read operation signs accurately and apply the correct operation in sequence
- Show work or use strategies to track multiple steps mentally or on paper
- Explain reasoning for answers using concrete language or drawings
Common mistakes to watch for
The most common error is students ignoring or misreading the operation sign and applying the same operation throughout (e.g., solving 9 + 3 – 2 as 9 + 3 + 2). You'll spot this when a child gets the first part right but adds when they should subtract, or vice versa. Another frequent mistake is losing track after the first operation and forgetting the second step entirely, leaving an incomplete answer. Watch for students who rush and don't reread the problem before answering.
Create a simple "shop" at home using toys, snacks, or coins. Give your child scenarios like, 'You have 7 toy cars. You add 4 more, then give away 3. How many do you have now?' Have them say the problem aloud before solving and point to each number and sign. This verbal rehearsal and physical object manipulation—similar to tracking items on solar panels for an energy project—helps cement the sequence of operations before they write answers down.