Week 10 · Measure and convert
Wednesday
Line plots with fractions
// Change units, then plot fraction measurements
⏱ about 15 min
Wednesday: Line plots with fractions
Lizzy the Lizard empties a pouch of seed pods onto a flat rock.
"I measured 12 pods to the nearest 1/8 inch," she says.
"Now I want to see which lengths are most common."
Bennie the Bear draws a long line in the sand.
"Let us make a line plot," he says. "Each pod gets an X above its length."
Lizzy places her X marks carefully, one by one.
"Look," she says. "Most of the pods are 1/2 inch long!"
Learn it: make a line plot
Lizzy's pod lengths in inches: 1/2, 1/4, 3/4, 1/2, 1/8, 1/2, 1/4, 3/8, 3/4, 1/4, 1/8, 1/2.
Draw a number line with marks for 1/8, 1/4, 3/8, 1/2, 5/8 and 3/4.
Put one X above the mark for each pod.
READ THE LINE PLOT
- Read the question.
- Tap your answer.
How many pods are 1/2 inch long?How many pods are 3/8 inch long or shorter?How many pods did Lizzy measure?
USE FRACTIONS WITH THE PLOT
- Read the question.
- Tap your answer.
How much longer is the longest pod than the shortest pod?
What is the total length of the 1/4 inch pods?
What is the total length of the 1/2 inch pods?
If Lizzy lines up all 12 pods end to end, how long is the line?
MAKE A LINE PLOT
- Think about how Lizzy made her plot.
- Tap the steps in order.
1First
2Next
3Then
4Last
Look at the X marks above each length.
| Sentence | True or false? |
|---|---|
| 2 pods are 3/4 inch long. | ? |
| No pods are 5/8 inch long. | ? |
| More pods are 1/4 inch than 1/2 inch. | ? |
| 3/4 - 1/8 = 5/8 | ? |
WHY THIS EXERCISEThere are 4 pods at 1/2 inch and 3 at 1/4 inch.
Try it
Find 8 pencils, crayons or sticks.
Measure each one to the nearest 1/4 inch.
Write each length in a list.
Make a line plot with an X for each length.
Measure each one to the nearest 1/4 inch.
Write each length in a list.
Make a line plot with an X for each length.
On paper, draw your own line plot of 8 measurements in fourths of an inch.
Wonderful plotting! Tomorrow Chris tells a story about sharing water fairly.