One Atta Time Flash Cards Distance Learning Create New Sheet Select a Worksheet > Version 1 Version 2 Version 3 Version 4 Version 5 Version 6 Version 7 Version 8 Version 9 Version 10 Grab 'em All Using Units to Measure 1md2 Measure the length of an object by lining up equal-size units end to end with no gaps or overlaps.Count the units to tell how long each object is.Use the same unit each time so measurements can be compared fairly.