Step by step
- 2 digits by 1. Multiply the ones, carry, then multiply the tens.
- 3 and 4 digits by 1. The same steps across more columns.
- 2 digits by 2. Two partial products, one for the ones and one for the tens, then add them.
- 3 digits by 2. Bigger numbers, the same method.
Times tables first
Long multiplication goes smoothly once the facts are automatic. If they are not yet, practise with the times tables worksheets alongside.In the MOE curriculum
- Primary 3The written method begins with up to 3 digits by 1 digit, after the tables of 6, 7, 8 and 9.
- Primary 4It extends to 4 digits by 1 digit and 3 digits by 2 digits, alongside rounding and estimation.
- Primary 5Children multiply by 10, 100, 1000 and their multiples, and use the order of operations.
This maker’s problems fit Primary 3 and 4 exactly: up to 3-digit by 1-digit numbers in P3, then 4-digit by 1-digit and up to 3-digit by 2-digit numbers in P4. Written multiplication in the primary syllabus goes no further than 3 digits by 2 digits.
P4 is also when children round to the nearest 10, 100 or 1000 and meet the ≈ sign, so ask for an estimate before each problem. Writing 287 × 6 ≈ 300 × 6 = 1800 beside the working gives a quick check on the answer.
Summarised in our own words from the MOE Primary Mathematics Syllabus (Primary One to Six, 2021, updated October 2025).