When we measure anything, we do it in human-defined ‘units’. Different units were defined in different places and for different scales. The two most common are U.S. customary units and metric units. Let’s think about how to convert between and among them! We’ll also continue thinking about perimeter and area!
(1) Estimating mass
(4) Estimating time
(10) Money word problems
(11) Area and perimeter
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