Convert measurements within a system and use unit reasoning to choose the correct scale.
Check whether a converted answer makes sense
Problem
Mia claims \(2~\text{hours}~=~20~\text{minutes}\). Is the claim reasonable, and should the numerical measure be larger, smaller, or unchanged?
Big Picture
What this problem is really about
Check the direction before doing arithmetic: changing from hours to the smaller unit of minutes must increase the numerical measure. Then apply the actual units-per-hour factor and compare the converted duration with the claim. A result that shrinks or uses a place-value shortcut fails both the scale test and the conversion fact.
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