Ready to Print
This Mixed Add Subtract drill has 40 problems for Grade 2. Dinosaurs theme. Answer key included.
⬇ Download Free Math DrillGet new free worksheets every week.
All worksheets checked by our AI verification system. No wrong answers — guaranteed.
Max discovered 12 dinosaur eggs hidden in the volcano! He must solve puzzles before lava reaches them!
Preview
Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 2 Mixed Add Subtract Drill
Mixed addition and subtraction problems are a critical bridge in Grade 2 math because they require students to slow down, read carefully, and choose the right operation—skills that directly transfer to real-world problem-solving. At ages 7-8, children's brains are developing stronger working memory, making this the ideal time to practice switching between adding and subtracting within the same set of problems. When a child encounters "Start with 15, add 3, then subtract 5," they're not just practicing computation; they're building mental flexibility and learning to process multi-step thinking. This foundation prevents the common mistake older students make of automatically adding or subtracting without understanding what a problem asks. Mastering mixed operations also boosts confidence because students realize they can handle variety and complexity, which motivates them to tackle harder math concepts later.
What your student will practice
- Identify whether to add or subtract based on problem language
- Solve mixed addition and subtraction problems within 20
- Maintain accuracy when switching operations in sequence
- Explain reasoning for choosing add versus subtract
Common mistakes to watch for
The most common error is "operation carryover," where students solve the first problem correctly but then automatically use the same operation for the next problem without reading it. For example, after solving "8 + 5," they'll add again on "12 – 3," getting 15 instead of 9. You'll spot this pattern by noticing correct work on odd-numbered problems but repeated wrong operations on even ones. Another frequent mistake is ignoring the minus sign entirely and reading all problems as addition, especially when students are working quickly.
Play a real grocery store game at home: place 8-12 toy items or snacks on the table and give two-step directions like "Start with 10 crackers, eat 3, then I give you 4 more—how many now?" Have your child use their fingers or move items physically before writing the answer. This concrete, kinesthetic approach helps them see addition and subtraction as real actions, not just symbols on paper, and the playful setting removes pressure so they focus on the operation switch itself.