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MathDecimal Drill
A timed game that turns decimal arithmetic into a reflex. Below: the alignment trick and the mistakes that cost points.
Choose your difficulty
Pick a level to start playing. You can switch at any time.
How to play
Add or subtract the two decimals and tap the result. Line up the decimal point in your head before you answer.
Tip: your progress and best score are saved in this browser only.
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MathHow to play
Add or subtract the two decimals, then tap the result with the correct number of decimal places. Harder levels use two decimal places, so watch the trailing zero.
Strategies that raise your score
- Align the decimal point first. Mentally stack the numbers so the points line up, then add or subtract as usual.
- Pad with zeros. 1.5 is the same as 1.50; padding keeps place value clear on the Hard level.
- Estimate before you answer. Round to the nearest whole number to sanity-check the result.
- Keep the streak alive. A short pause beats a careless mismatch.
Common mistakes
Forgetting a trailing zero turns 2.40 into 2.4 and loses the point. Keep the places exact.
Decimals show up everywhere from money to measurement, so this drill pays off beyond the game.