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Current time:0:00Total duration:2:21

Multiplying fractions by whole numbers word problem

CCSS.Math: ,

Video transcript

Rishi spent 3/4 of an hour for two days working on his science project Kyle spent 1/4 of an hour for 6 days working on his science project who spent more time on his science project so we want to know who spent more time and to do that we need to first know the amount of time Rishi and Kyle each spent on their science projects so let's start let's start with Rishi and see what we know about Rishi Rishi spent 3/4 of an hour for two days so two times he spent 3/4 of an hour or another way we could say this is he spent three for seven hour once plus on a second day he spent another 3/4 of an hour so 3/4 plus another 3/4 will give us a total of 6 fourths or 6 quarter hours that Rishi spent on his science project now let's look at Kyle Kyle spent 1/4 of an hour so here's Kyle Kyle spent 1/4 of an hour but he did this for six days so 6 times he spent 1/4 of an hour or we could say but Kyle spent 1/4 of an hour one day plus the fourth of an hour second day fourth of an hour third day a fourth day a fifth day and then a sixth day he spent 1/4 of an hour so 6 times 1 2 3 4 5 6 he spent a quarter or 1/4 of an hour working on his project so if we have 6 1 fourths then we have a total of 6 fourths so Kyle spent 6 fourths or 6 quarter hours and now back to our question now that we know how much each of them spent who spent more time working on his science project Rishi was 6 forth hours or Kyle with 6/4 hours and the answer here of course is that these are equal these are the same Rishi and Kyle spent the same amount of time so we can say the same amount of time working on each of their science projects