In this cluster, students explore metric measurement for length, volume, and mass to develop a sense of the value of the different metric units. Students continue to build on the patterns and relationships when you multiply by 10 and 100 that were noticed when unpacking the place value system in Cluster 3. They apply their knowledge of multiplicative comparison to make sense of tenths and hundredths in the place value system and to convert from one metric unit to another using a conversion table. They work within the contexts of real-world data collection and measurement to represent and compare decimals. (See About this Cluster and the Unpacking Document below for more details on this cluster.)