Description

If missing-addend practice in your classroom usually turns into guessing, disengagement, or another worksheet students rush through, you’re not alone. Addition and subtraction with regrouping are tough skills—and repetitive drills don’t always build confidence.

This missing addend digital math game helps you move from low engagement and surface-level practice to focused, motivated problem-solving that students actually stick with.

Instead of worksheets, students solve missing number equations using 3-digit addition and subtraction with regrouping inside a self-checking Google Sheets activity. With each correct answer, students unlock mystery items and work toward revealing a hidden picture, turning essential math practice into a solve-and-search challenge that feels like a game.

No prep. No grading. Just meaningful math practice that works.

Students Will Practice

• Finding the missing number in addition and subtraction equations

• Solving 3-digit addition with multiple addends

• Solving 3-digit subtraction with and without regrouping

• Checking work using instant feedback

• Building perseverance and accuracy during independent math work

What’s Included

• Self-checking Google Sheets missing addend activity (no prep required)

• 10 missing-number problems using:
  • 3-digit addition with and without regrouping

  • 3-digit subtraction with and without regrouping

• Automatic feedback (green = correct, red = try again)

• 10 mystery items revealed with each correct answer

• Hidden picture seek-and-find challenge as a motivating final reward

• Student-friendly layout (no Google Sheets experience needed)

• Teacher directions + Google Classroom tips

• Printable student worksheet for showing work or modeling

Why Teachers Love This Resource

• Students stay engaged because practice feels purposeful and fun

• Instant feedback supports independence and self-correction

• No printing, grading, or prep required

• Easy to assign digitally for centers or early finishers

• Keeps students focused all the way to the final reveal

Perfect For

• 2nd grade, 3rd grade, and 4th grade math

• Missing addend practice

• Addition and subtraction with regrouping review

• Math centers and small groups

• Independent practice and early finishers

• Homework, test prep, or sub plans

• Digital learning and homeschool settings

Teacher Feedback

“My students were completely focused—and didn’t even realize how much math they were doing.”
— 3rd Grade Teacher

“I love that this builds real problem-solving skills without extra grading.”
— Sopia G.

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