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This Mixed Add Subtract drill has 40 problems for Grade 1. Windmills theme. Answer key included.
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Max discovered the windmill's giant blades are stuck! He must solve math problems fast to spin them and save the village.
Standard: CCSS.MATH.1.OA.C.6
Mixed addition and subtraction problems are a critical bridge in Grade 1 math because they move children beyond solving just one type of problem at a time. When a six- or seven-year-old sees both plus and minus signs on the same page, their brain must stay flexible and make quick decisions about which operation to use. This builds mathematical thinking in real ways—like when a child figures out she has 5 blocks, builds 3 more, then puts 2 away, she's actually doing mixed operations without realizing it. Practicing these problems strengthens number sense, sharpens attention to detail, and helps children develop the habit of reading each problem carefully before solving. By the end of Grade 1, fluency with mixed add-subtract within 10 is a foundational skill that opens the door to more complex math in Grade 2.
The most common error at this age is sign confusion—students solve an addition problem when the minus sign is shown, or vice versa. They may read too quickly and miss the operator entirely, or they might add the numbers regardless of the symbol because addition feels more familiar. Watch for students who solve 7 - 2 as 7 + 2, or who hesitate and change their answer midway through the grid. The fix is to slow down: ask the child to point to and say aloud the sign before solving, then solve. This one-second pause works remarkably well.
Use snack time or toy cleanup as a natural mixed-operation moment. Say, 'You have 4 crackers, I give you 3 more—how many now?' Then after she eats 2: 'Now how many do you have?' Doing this with real objects your child can see and touch makes the abstract symbols on the worksheet suddenly concrete. Repeat this kind of quick, playful scenario 2–3 times a week, and you'll see confidence bloom on the actual drills.