Do your students need extra practice with decomposing numbers before the FASTbridge earlyMath assessment? These Decomposing Numbers Practice Cards are designed to help first grade students quickly and confidently break numbers into parts.

These cards closely mirror the structure students encounter on the FASTbridge earlyMath Decomposing subtest, making them perfect for building familiarity while strengthening number sense and fact fluency.

Students practice breaking numbers 5–20 into two parts in multiple ways, helping them develop flexible thinking about numbers.

This resource is perfect for quick, engaging practice that fits easily into your daily math routine.

What’s Included

✔ Decomposing number practice cards for numbers 5–20 ✔ Multiple decomposition combinations for each number ✔ Teacher instruction page ✔ Ideas for small group, centers, and intervention ✔ Printable cards for easy prep and reuse

Simply print, cut, and practice!

Ways to Use This Resource

These decomposing cards are perfect for:

• Math centers • Small group instruction • RTI or intervention groups • FASTbridge assessment preparation • Math warm-ups • Partner practice • Early finisher activities • Progress monitoring practice

Students simply look at the number and say two numbers that make the total.

Short, frequent practice sessions help students build speed, confidence, and number sense.

Skills Covered

Students practice:

• Decomposing numbers • Part-part-whole relationships • Number combinations • Mental math strategies • Flexible thinking with numbers

These are key foundational skills for addition and subtraction in first grade.

Why Teachers Love This Resource

✔ Low prep ✔ Quick practice that fits into any schedule ✔ Builds number sense and fact fluency ✔ Great for intervention and differentiation ✔ Helps students feel confident before assessments