Help students build number sense and estimation skills with this interactive Adding and Subtracting Decimals by Rounding Boom Cards™ deck! 💡

In this engaging activity, students round each decimal to the nearest whole number, then add or subtract to find a quick, reasonable estimate. Each card guides learners through the process step-by-step, reinforcing their understanding of place value, rounding rules, and reasonableness of answers.

Perfect for 5th grade math or as a review for 4th grade, this self-checking deck gives instant feedback while encouraging mental math and estimation strategies that strengthen overall decimal fluency.

💻 What’s Included:

• 15 interactive Boom Cards™
• Mix of addition and subtraction decimal problems
• Step-by-step format: round ➜ estimate ➜ solve
• Built-in self-checking for immediate feedback
• Visually engaging design to support understanding
  

🎯 Skills Covered:

• Rounding decimals to the nearest whole number
• Estimating sums and differences with decimals
• Checking the reasonableness of answers
• Strengthening place value and mental math fluency
  

👩‍🏫 Perfect For:

✅ Grades 4–5 math
✅ Independent or small group practice
✅ Math centers and digital review
✅ Test prep or spiral review
✅ Intervention and RTI