Here we have a tricky little worksheet on rounding measurements, best suited to Year 5.
This is harder than most other rounding pages as the units change. For example, in the first question the units are shown in grams but the answer is required in kilograms, so the answer equires two steps:
1. round the number to the nearest 1000 (as there are 1000 grams in a kilogram)
2. change the unit from grams to kilograms.
Remember, when rounding to the nearest 1 000 it is the hundreds digit which is crucial: 5 or above round up, below 5 round down to the nearest 1000.