Mathematics
Grade 2
15 min
Interpret stem-and-leaf plots
Interpret stem-and-leaf plots
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1
Introduction & Learning Objectives
Learning Objectives
Identify the 'stem' and the 'leaf' in a plot.
Read a two-digit number from a stem and a leaf.
Find the smallest number in a stem-and-leaf plot.
Find the largest number in a stem-and-leaf plot.
Count the total number of values in a plot.
Tell how many numbers are in a specific row.
How can we sort a big pile of numbers really fast? 🔢 Let's learn a cool trick!
We will learn about a special chart. It is called a stem-and-leaf plot. It helps us see our numbers in a neat and tidy way. ✨
Real-World Applications
Counting scores in a basketball game 🏀
Seeing how many stickers friends have ⭐
Sorting the heights of different flowers 🌷
Checking daily high temperatures for a month ☀️
2
Key Concepts & Vocabulary
TermDefinitionExample
Stem-and-Leaf PlotA special chart that sorts numbers. It has two parts: stems and leaves.A chart showing the number of crayons 🖍️ in different boxes.
StemThe first part of a number. It is like the tens place.In the number 28, the stem is 2.
LeafThe second part of a number. It is like the ones place.In the number 28, the leaf is 8.
KeyA helper note that tells us how to read the plot. 🔑Key: 2 | 8 means 28.
Smallest NumberThe very first and smallest number on the whole plot.If the first row is 1 | 4, the smallest number is 14.
Largest NumberThe very last and biggest number on the whole plot.If the last row is 9 | 2, the largest number is 92.
3
Core Formulas
How to Read a Number
Stem | Leaf = Full Number
Put the stem number in front of the leaf number to make the full number.
How to Find the Total
Total = Count all the leaves 🍃
To find how many numbers are in the plot, just count every single leaf.
4 more steps in this tutorial
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Challenging
A class recorded their heights in inches. One student's height is missing from the plot.
Heights (inches)
Stem | Leaf
4 | 5, 8, 9
5 | 1, ?, 6
6 | 0
Key: 4 | 5 means 45
The missing height is greater than 51 and less than 56. What is the missing leaf?
A.6
B.1
C.4
D.0
Challenging
Below are two plots showing the number of apples picked by Class A and Class B.
Class A Apples
Stem | Leaf
2 | 3, 8
3 | 1, 4, 4
Class B Apples
Stem | Leaf
2 | 5, 9, 9
3 | 0, 2
Key: 2 | 3 means 23
Which class picked more apples in the 20s?
A.Class B
B.Class A
C.They picked the same amount.
D.Cannot tell from the plots.
Challenging
This plot shows the number of beads in different jewelry kits.
Beads in Kits
Stem | Leaf
5 | 8
6 | 1, 2, 9
7 | 0, 3, 4, 4, 8
8 | 2
Key: 5 | 8 means 58
Where are most of the bead counts clustered or grouped together?
A.In the 50s
B.In the 70s
C.In the 80s
D.They are spread out evenly.
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