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This Mixed Add Subtract drill has 40 problems for Grade 2. Teachers theme. Answer key included.
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Max discovered the teacher's grade book scattered across the classroom floor! He must solve 20 problems before the bell rings and class begins!
Standard: CCSS.MATH.2.OA.B.2
Mixed addition and subtraction problems are where second graders begin to think flexibly with numbers instead of following a single operation step-by-step. At ages 7-8, students are developing the ability to read a problem carefully, decide whether to add or subtract, and execute the right strategy—a skill that mirrors real-world decision-making like a teacher counting supplies (adding new items, subtracting used ones) or a child managing allowance money. This practice strengthens number sense because students must recognize what the problem is asking rather than defaulting to a memorized procedure. Mastery of mixed operations builds confidence and prepares students for more complex word problems and multi-step thinking they'll encounter in third grade and beyond.
Many Grade 2 students ignore the operation symbol entirely and default to adding every problem, especially if they've just finished an addition unit. Watch for students who automatically say the larger number first (writing 5 + 12 = 17 instead of 12 − 5 = 7) or who rush through without glancing at the symbol. Another common error is solving the operation correctly but writing it backward (answering 15 − 3 as 12, but writing it as 3 − 15 = 12). Have students point to the symbol before solving and repeat aloud what operation they're doing.
Create a simple shopping or classroom supply scenario at home or in class: "We have 18 pencils. We use 7. How many left?" Then immediately follow with, "Now we find 5 more pencils. How many do we have now?" This chain of mixed operations mirrors how problems actually appear on the worksheet and helps students practice the mental switch between subtracting and adding. Have your child or student say the operation symbol out loud before solving each part—this forces attention to the symbol and reinforces the habit of reading carefully.