Primary 1
2 MEASUREMENT
Time Include telling and writing time to the hour/ half hour.
Exclude 24-hour clock.

Primary 2
3 MEASUREMENT
Include: • telling and writing time to 5 minutes,
• use of ‘a.m.’ and ‘p.m.’,
• use of abbreviations h and min,
• drawing hands on the clock face to show time,
• duration of one hour/ half hour from an o’clock time.
Exclude finding the duration of a time interval.

Primary 4
4 MEASUREMENT
Time Include:
• measurement of time in seconds (s),
• 24-hour clock,
• solving word problems involving time in 24-hour clock.

Primary 5 Foundation Mathematics (Calculator is allowed unless otherwise stated)
4 MEASUREMENT
Time Include:
• finding the duration of a time interval,
• 24-hour clock,
• solving up to 3-step word problems involving addition and subtraction of time given in hours and minutes.

reference:
https://www.moe.gov.sg/docs/default-source/document/education/syllabuses/sciences/files/2007-mathematics-(primary)-syllabus.pdf