Max Rescues Lost Stars: Addition and Subtraction

About this Grade 1 Mixed Add Subtract Drill

At age 6 and 7, your child is beginning to understand that numbers can be taken apart and put back together in different ways. Mixed-add-subtract problems—where students solve both addition and subtraction in the same set of exercises—help build crucial mental flexibility. Rather than seeing math as isolated facts, children learn that adding and subtracting are connected operations. This skill is foundational for later algebra and helps kids develop number sense, the intuitive feel for how quantities relate to each other. When your first grader solves 5 + 2 = 7 and then 7 - 2 = 5, they're discovering that addition and subtraction "undo" each other. This understanding transforms math from memorization into logical thinking, which supports stronger problem-solving throughout their education.

What your student will practice

• Solve addition and subtraction problems within 10 fluently
• Recognize the inverse relationship between adding and subtracting
• Apply flexible strategies to solve mixed problems in sequence
• Build confidence switching between two operations without confusion

Common mistakes to watch for

First graders often confuse the operation sign or forget to switch their thinking when moving from addition to subtraction. You might notice your child adding when they should subtract, especially if two addition problems appear first—the momentum carries over. Another common error is losing track of the starting number; for example, solving 6 + 3 = 9 correctly, but then treating 9 as the starting point for the next problem instead of starting fresh. Watch for hesitation or frustration when the operation changes, which signals the child needs more practice recognizing the symbol before solving.