Max Conquers the Word-Wizard's Magic Number Castle

About this Grade 1 Mixed Add Subtract Drill

At age 6 and 7, first graders are developing the mental flexibility to handle math problems that mix both addition and subtraction in a single step. This skill is crucial because real life rarely presents math in isolation—a child might receive 3 stickers, lose 1, then gain 2 more. When students practice mixed-add-subtract, they're building number sense and learning to read carefully before jumping to answers. They're also strengthening their ability to track what's happening in a story problem, which supports reading comprehension alongside math reasoning. This work lays the foundation for multi-step problem solving in second grade and beyond. Fluency with these combined operations helps children feel confident and less overwhelmed when math becomes more complex.

What your student will practice

• Solve addition and subtraction problems with sums and differences within 10
• Identify whether a word problem requires adding or subtracting
• Use objects, fingers, or drawings to model mixed-operation problems
• Explain thinking aloud when solving problems with two operations

Common mistakes to watch for

The most common error is that first graders perform the first operation correctly but then forget what they found or misread the second operation. For example, they'll solve 5 + 2 = 7 correctly, but then subtract instead of add (or vice versa) in the follow-up step, arriving at 5 instead of 9. Another frequent pattern is losing track of the starting number when it's reused—if a problem says "Start with 4, add 3, then subtract 2," students sometimes restart from 3 instead of continuing from 7. Watch for students who rush through without using fingers or objects to show their work; they're more likely to make these mistakes.