Whole numbers for Singapore primary maths
Use counters and place-value models to connect quantities with written numbers. Start with counting and comparing, then move to rounding, factors, multiples and order of operations.
Choose your primary level and path. Each guide links to the interactive lesson and its prerequisite ideas.
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 2 whole numbers
- Count and represent numbers to 1000Count and represent numbers to 1000 · About 8 minutes
- Use hundreds, tens and onesUse hundreds, tens and ones · About 8 minutes
- Read and write number names to 1000Read and write number names to 1000 · About 8 minutes
- Compare and order numbers to 1000Compare and order numbers to 1000 · About 8 minutes
- Continue number patternsContinue number patterns · About 8 minutes
- Recognise odd and even numbersRecognise odd and even numbers · About 8 minutes
Primary 3 whole numbers
- Represent numbers to 10000 using place valueRepresent numbers to 10000 using place value · About 10 minutes
- Read and write numbers to 10000Read and write numbers to 10000 · About 10 minutes
- Compare, order and continue patterns to 10000Compare, order and continue patterns to 10000 · About 10 minutes
Primary 4 whole numbers
- Represent and compare numbers to 100000Represent and compare numbers to 100000 · About 10 minutes
- Round to the nearest 10, 100 and 1000Round to the nearest 10, 100 and 1000 · About 10 minutes
- Estimate and check calculationsEstimate and check calculations · About 10 minutes
- Read and write number names to 100000Read and write number names to 100000 · About 10 minutes
- Continue number patterns to 100000Continue number patterns to 100000 · About 10 minutes
- Find factors of numbers up to 100Find factors of numbers up to 100 · About 10 minutes
- Find common factors of two numbersFind common factors of two numbers · About 10 minutes
- Find multiples and common multiples of one-digit numbersFind multiples and common multiples of one-digit numbers · About 10 minutes
Primary 5 whole numbers
- Read and write numbers to 10 millionRead and write numbers to 10 million · About 12 minutes
- Multiply and divide by 10, 100, 1000 and their multiplesMultiply and divide by 10, 100, 1000 and their multiples · About 12 minutes
- Use the order of operations and brackets without a calculatorUse the order of operations and brackets without a calculator · About 12 minutes
Primary 5 Foundation whole numbers
- Read and write numbers to 10 millionRead and write numbers to 10 million · About 12 minutes
- Compare, order and continue patterns within 100000Compare, order and continue patterns within 100000 · About 12 minutes
- Round to the nearest 10, 100 and 1000Round to the nearest 10, 100 and 1000 · About 12 minutes
- Find factors and common factors of numbers up to 100Find factors and common factors of numbers up to 100 · About 12 minutes
- Find multiples and common multiples of one-digit numbersFind multiples and common multiples of one-digit numbers · About 12 minutes