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This Mixed Add Subtract drill has 40 problems for Grade 2. Escape Room theme. Answer key included.
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Max discovered a locked door with number puzzles! He must solve equations fast to unlock the exit before time runs out!
Standard: CCSS.MATH.2.OA.B.2
At age 7-8, second graders are developing the mental flexibility to handle problems that switch between addition and subtraction in a single step. This skill is crucial because real life rarely presents math in isolation—when your child counts their allowance, spends some, and then receives more, they're doing mixed operations naturally. Mastering mixed-add-subtract strengthens number sense and helps students see math as a connected system rather than separate operations. This foundation prevents the common struggle many older students face when word problems demand multiple operations. By drilling these patterns now, your child builds automaticity so their brain can focus on understanding what a problem is asking rather than getting stuck on the computation itself.
Many second graders solve the first problem correctly but then lose track of the operation symbol when problems alternate between + and −. Watch for students who solve 8+6=14, then immediately treat 13−4 as addition, writing 17. Another common error is reversing the numbers when subtracting (writing 4−13 instead of 13−4), especially if subtraction appears after addition. You'll spot this by noticing they get some answers that seem too large or checking if they always subtract the bigger number from the smaller one.
Play a 'shopping spree' game at home: give your child 15 pennies or small objects to start. Call out mixed operations like 'Add 3 more pennies, now subtract 4.' Let them physically move objects and write the number sentence each time. This makes the operation switch tangible and helps them see that addition and subtraction are reversible actions—like an escape room where you collect clues and then use some of them.