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This Mixed Add Subtract drill has 40 problems for Grade 2. Chemistry Lab theme. Answer key included.
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Max discovered fizzing beakers everywhere! He must solve equations fast before the bubbling potions overflow the entire lab!
Standard: CCSS.MATH.2.OA.B.2
Mixed addition and subtraction problems are where Grade 2 students truly develop flexible thinking about numbers. At ages 7-8, children are moving beyond isolated fact families and learning to work with both operations in a single problem—a crucial stepping stone to real-world math. When your child counts their allowance, then spends some, then finds extra coins, they're doing mixed operations without realizing it. Mastering these problems builds number sense, strengthens fact fluency, and prepares students for word problems and multi-step thinking. Students who practice mixed-add-subtract develop confidence switching between operations and learn that numbers are flexible tools, not rigid facts to memorize. This skill also trains working memory and focus—exactly what developing brains need at this age.
The most common error Grade 2 students make is ignoring the operation symbol and defaulting to addition every time—so 8 − 3 + 2 becomes 8 + 3 + 2 = 13 instead of 7. You'll also see students solve the problem correctly but then forget they've already completed one step and recalculate. Watch for hesitation or frustration when the second operation appears; this signals the student hasn't internalized that both symbols matter. A quick tip: ask "What does this symbol tell us to do?" before solving, rather than pointing out the error after.
Practice mixed operations during snack time or cleanup. Say, "We have 6 crackers, eat 2, and I'm adding 4 more—how many now?" This real-world rhythm mirrors the worksheet format and helps 7-8-year-olds see why both operations matter. Do this 2-3 times during a week, keeping numbers small and manageable, and you'll notice quicker symbol recognition on paper. The concrete experience of objects changing quantity twice in one scenario is far more memorable than drill alone.