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Finding reasonable unit of measurement example

CCSS.Math:

Video transcript

identify the most reasonable units to measure each of the following choices so the time it takes to bake one pan of cookies let's see that's usually in the minutes so I'll go with minutes unless you're doing some type of slow baking but I'll say minutes is a is a reasonable unit here the time it takes to pour a cup of coffee well that that might take you at most one or two seconds so you definitely want to do it in hours or years if we already used up minutes and you definitely want to use minutes either it's only a few seconds the time it takes to drive from Chicago to st. Louis well that's hopefully won't take you years that'll take you I don't know the exact distance but it's gonna take you several hours to do that so I will go with hours let's do a few more of these identify the most reasonable units to measure each of the following choices below with kilometers meters and millimeters in a kilometer of course Killough tells us that's equivalent to a thousand meters and milli means one thousandth of a meter another way of thinking about a meter is a thousand millimeters and a kilometer is a thousand meters the length of a ladybug well the length unless it's some kind of some kind of monster or ladybug we're probably thinking in millimeters the height of an average person so an average person is multiple meters it's going to be at least one meter tall but and in more more likely closer to 2 meters especially your average male adult male would be right around 2 meters tall so I would go with meters the length of a marathon so this is a long distance race we're talking about here if you're used to thinking in in in in English and you say US customary units a marathon is 26 miles a kilometer isn't quite equal to a mile it's around 1.6 kilometers is equal to a mile but it also makes sense to measure this in kilometers you would measure the length of a marathon and miles or kilometers you'd measure the height of an average person if you're using US customary units you would do it in feet if you're using metric units you'd do it in meters the distance between San Francisco and Los Angeles once again this is several thousand kilometers will go with kilometers are actually San Francisco to Los Angeles is several hundred kilometers I thought that said New York to Los Angeles San Francisco Los Angeles several hundred kilometers but still you went two kilometers the length of an average sized swimming pool well meters seems like a reasonable measure there your average pool might be 25 meters or 50 meters or something like that the thickness of a slice of bread so a slice of bread if I had it would be it's definitely a lot thinner than a meter so I'm gonna go with millimeters and go with millimeters down here check our answer we got it right let's do one more identify the most reasonable units to measure the weight of each of the following choices below so see we have ounces and pounds and just as a reminder one pound is equal to 16 ounces or an ounce is equal to 1/16 of a pound so a couch well that's going to be many many many pounds probably over a hundred pounds so we definitely won't put this in the pounds category a cookie unless it's a really large cookie it's going to weigh less than a pound so I I'm comfortable going it seems reasonable to go with ounces a television well they get they're getting lighter every day but they still weigh a good bit they still weigh multiple pounds usually multiple tens of pounds so we'll go with pounds a cracker and once again unless we're talking about a really huge cracker most crackers are very very light lighter than even a cookie so we will go with ounces