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Round 1 of 6
Drag the decimals into order from smallest to largest
Drag cards up and down to reorder, then check your answer
Smallest
Largest
Use this in your classroom
Embed in Google Slides, Classroom, Seesaw or any website — it stays interactive
How to use this in the classroom
Number-line ordering drill for decimals. Students drag decimals into ascending or descending order. Especially valuable for Year 4–5 where ordering decimals is a frequent assessment item — and a frequent error source.
What it builds
Decimal magnitude comparison. The skill 'is 0.5 bigger or smaller than 0.45?' looks simple but trips many students — they compare digit by digit as if the decimals were whole numbers. This game forces real value comparison.
Common misconceptions it surfaces
- Comparing as integers. Students rank 0.7, 0.65, 0.5 as 0.65 > 0.7 because '65 is bigger than 7'
- Length-bias ordering. Students think the longest decimal is the biggest (so 0.234 > 0.7)
- Aligning-from-the-left. Students compare 0.45 vs 0.5 by looking at the first decimal digit (4 < 5) — correct here, wrong for 0.5 vs 0.45
Differentiation
- Going slower: Order 3 decimals at a time with the same number of decimal places.
- Going faster: Order 6+ decimals with mixed places (0.5, 0.45, 0.453, 0.5).
- Extension: Students sketch each decimal on a 0-1 number line after ordering to verify visually.