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This Mixed Add Subtract drill has 40 problems for Grade 1. Farm theme. Answer key included.
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Max discovered the barn door open! Chickens, goats, and pigs escaped everywhere. Max must solve math problems to round them all up before dark!
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Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 1 Mixed Add Subtract Drill
At age 6 and 7, children are developing what mathematicians call "flexible thinking"—the ability to switch between addition and subtraction within the same problem set. Mixed-add-subtract drills strengthen this flexibility, which is foundational for all future math learning. When a child sees both + and − signs on the same page, their brain must pause, identify the operation, and select the correct strategy each time. This is harder than practicing only addition or only subtraction, but it's exactly what real math requires. In daily life, kids constantly face mixed situations: "You had 5 snacks, ate 2, then got 3 more—how many now?" These drills train that exact mental muscle. Building this skill now prevents the common mistake of automatically using the same operation regardless of the symbol, and it builds confidence for second grade, where mixed-operation word problems become routine.
What your student will practice
- Identify whether a problem asks to add or subtract by reading the symbol
- Solve single-digit mixed addition and subtraction facts within 10
- Transition quickly between addition and subtraction without hesitation
- Apply correct strategies to mixed problems without reverting to one default operation
Common mistakes to watch for
The most common error is **operation persistence**: a child solves the first problem as addition, then automatically adds the next problem even though it shows a minus sign. You'll spot this pattern when problems alternate (e.g., 3+2, 5−1, 4+3, 6−2) and the child answers them as 5, 6, 7, 8 instead of checking each symbol. Another frequent mistake is pausing longer on minus problems because subtraction feels less automatic—this is normal, not a sign of weakness. Watch for the child's eyes; if they're not moving to the symbol before computing, they're likely guessing the operation.
Use a simple sorting game at home: call out mixed math sentences ("4 plus 2" and "6 minus 1") and have your child jump to the left for addition or right for subtraction before answering. This physical movement separates the *symbol recognition* step from the *computation* step, making the two-step process visible. Rotate who's the caller. Even 2–3 minutes daily helps wire the habit of checking the symbol first, just like a farmer checking the weather before planting.