Singapore · Standard Mathematics
Primary 1 maths lessons
Start with counting to 100, tens and ones, number bonds, addition and subtraction. Use pictures to explore equal groups, money, clocks, shapes and picture graphs.
30 lessons and 29 interactive activities. No sign-in is needed to read or practise.
Primary 1 operations
- Find the missing partFind a missing part when the whole and one part are known · About 10 minutes
- Missing numbers in take-awayFind the starting number when the parts are known · About 10 minutes
- Add by combining two setsAdd by combining two sets · About 8 minutes
- Subtract by taking awaySubtract by taking away · About 8 minutes
- Connect addition and subtraction with number bondsConnect addition and subtraction with number bonds · About 8 minutes
- Use +, − and = correctlyUse +, − and = correctly · About 8 minutes
- Add and subtract within 100Add and subtract within 100 · About 8 minutes
- Add three one-digit numbersAdd three one-digit numbers · About 8 minutes
- Add four small numbers · extra practiceExtend three-number addition by joining one more small group, with totals within 20 · About 10 minutes
- Recall addition and subtraction facts within 20Recall addition and subtraction facts within 20 · About 8 minutes
- Add or subtract ones and tens mentally without regroupingAdd or subtract ones and tens mentally without regrouping · About 8 minutes
- Recognise equal groups and multiplication within 40Recognise equal groups and multiplication within 40 · About 8 minutes
- Share or group equally within 20Share or group equally within 20 · About 8 minutes
Primary 1 whole numbers
- Count and represent numbers to 100Count and represent numbers to 100 · About 8 minutes
- Use tens and onesUse tens and ones · About 8 minutes
- Read and write number names to 100Read and write number names to 100 · About 8 minutes
- Compare and order numbers to 100Compare and order numbers to 100 · About 8 minutes
- Continue number patternsContinue number patterns · About 8 minutes
- Use ordinal numbers from first to tenthUse ordinal numbers from first to tenth · About 8 minutes
Primary 1 measurement & time
- Count cents up to one dollarCount cents up to one dollar · About 8 minutes
- Count dollars up to 100 dollarsCount dollars up to 100 dollars · About 8 minutes
- Measure and compare lengths in centimetresMeasure and compare lengths in centimetres · About 8 minutes
- Draw a line to the nearest centimetreDraw a line to the nearest centimetre · About 8 minutes
- Read clocks to five minutes using am and pmRead clocks to five minutes using am and pm · About 8 minutes
- Relate hours and minutesRelate hours and minutes · About 8 minutes
- Find durations of one hour or half an hourFind durations of one hour or half an hour · About 8 minutes
Primary 1 geometry
- Recognise rectangles, squares, triangles, circles, half-circles and quarter-circlesRecognise rectangles, squares, triangles, circles, half-circles and quarter-circles · About 8 minutes
- Compose and decompose shapesCompose and decompose shapes · About 8 minutes
- Copy figures on dot or square gridsCopy figures on dot or square grids · About 8 minutes
Primary 1 data & graphs
- Read and interpret picture graphs with one object per symbolRead and interpret picture graphs with one object per symbol · About 8 minutes