#MeasurementAndSpace >[!info]- [Non-spatial measure B | NSW Curriculum Website](https://curriculum.nsw.edu.au/learning-areas/mathematics/mathematics-k-10-2022/content/stage-3/faebab48ca) MA3-NSM-01 selects and uses the appropriate unit and device to measure the masses of objects MA3-NSM-02 measures and compares duration, using 12- and 24-hour time and am and pm notation >[!abstract]- Prior Knowledge >- [[Non-spatial Measure A]] ## Mass: Convert between common metric units of mass - Convert between kilograms and grams and between kilograms and tonnes - Solve problems involving different units of mass ## Time: Solve problems involving duration, using 12- and 24-hour time - Use start and finish times to calculate the elapsed time of events - Add and subtract time mentally using bridging strategies - Round answers to time calculations to the nearest minute or hour - Represent commonly used time intervals as decimals - Solve a variety of problems involving duration, including where times are expressed in 12-hour and 24-hour notation