Free printable math drill — download and print instantly
This Mixed Add Subtract drill has 40 problems for Grade 1. Space Documentary 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 received mysterious alien signals! He must decode number patterns before the spaceship disappears into a black hole!
Standard: CCSS.MATH.1.OA.C.6
At age 6 and 7, your child is building the mental flexibility needed to switch between adding and subtracting within the same problem—a skill that mirrors real-world decision-making like managing toys, snacks, or coins. Mixed-add-subtract problems teach children that math isn't just about following one rule; it's about reading carefully, planning their approach, and adjusting their thinking mid-problem. This develops what educators call "computational fluency," which means your child can solve problems quickly and accurately without counting on fingers every time. By practicing these mixed operations now, children strengthen their working memory and attention to detail—skills that extend far beyond math into reading and following multi-step instructions. When a child solves a problem like "5 + 2 - 1," they're actually practicing the same kind of thinking an astronomer uses when calculating distances between stars and planets, tracking gains and losses in sequence. This drill builds confidence that math problems can have multiple steps, and that's not scary—it's just how the real world works.
The most common error is that children solve only the first operation and stop, writing an answer without completing the second step. For example, with "6 + 2 - 1," they'll compute "6 + 2 = 8" and write 8 as their final answer, forgetting the subtraction entirely. Another frequent mistake is reversing the order of operations—subtracting the first number instead of adding it, or mixing up which number comes first in a subtraction. Watch for hesitation or pointing to each symbol; this signals your child is unsure which operation comes next. You'll also notice some children recount from 1 every time rather than using the first number as their starting point.
Use snack time or toy cleanup as your drill-ground. Tell your child: "We had 4 crackers, then you ate 1, and Mom gave you 3 more—how many do we have now?" Say the problem aloud twice, then ask them to tell you each step before answering. This mirrors the worksheet format (add first, then subtract, or vice versa) but uses real objects your child can touch and recount if needed. Repeat this activity 2–3 times per week with different numbers, always keeping the total under 10 and starting with concrete objects before moving to just words.