Main content

## 3rd grade

### Unit 14: Lesson 3

Line plots with fractions- Measuring lengths to nearest 1/4 unit
- Measure lengths to nearest 1/4 unit
- Graphing data on line plots
- Graph data on line plots
- Interpreting line plots with fractions
- Read line plots (data with fractions)
- Line plots review
- Represent and interpret data: FAQ

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# Measuring lengths to nearest 1/4 unit

CCSS.Math:

Use a ruler to measure lengths to the nearest 1/4 unit. Created by Sal Khan.

## Video transcript

- [Instructor] We are
asked what is the height of the sunflower? So pause this video and think about it. All right, so let's see. The bottom of the
sunflower is right aligned with the bottom of the ruler, so there ruler's in the right place. And let's see, the sunflower goes all the way up to this
point right over here. So this is one, two, three, four, five, and then a little bit more. So we're going to get into a fraction. So what is this extra amount? So if we can see the space between five and six is divided into
four equal sections. So we have, one, two, three, four. Or we could see it here. They've divided it with
these little hash marks into one, two, three, four equal sections. And this goes one of
those four equal sections towards six, so this is 5 1/4 feet. That's how tall the sunflower is. All right, let's do another example. So here we are told, or we are asked, which pencil measures 2 3/4 of an inch? So pause this video and
try to think about it. All right, so we go one inch, two inches, and then we have to think about how far between two and three is 3/4? So to think about 3/4, we have to divide the part, or
the part of this ruler, between two and three
into four equal sections. So let's see. If I were to just split it like this, that's two equal sections. So if I were to take each of those two equals sections and then split them, now
that's four equal sections. Notice one, two, three,
four equal sections. So when we're thinking about 3/4, we wanna go three of
those four equal sections. One, two, three. And so you can see right over here, that is 2 3/4. This is 2 3/4 right over here. And that is pencil A.