SME
Grade 2 Math · Problem type
Show data in a line plot
Use this to make a line plot of lengths and find the longest, shortest and most common.
Picture
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5
1 object
6
2 objects
7
4 objects
8
3 objects
9
2 objects
10
0 objects
11
1 object
Length in centimeters
This is an example. Type the numbers from your problem to start.
First length on the line
example · cm
Objects at the first length
example
Objects 1 cm longer
example
Objects 2 cm longer
example
Objects 3 cm longer
example
Objects 4 cm longer
example
Objects 5 cm longer
example
Objects 6 cm longer
example
Objects measured
worked out
Longest length
worked out · cm
Shortest length
worked out · cm
Most common length
worked out · cm
Number sentences
13 = 1 + 2 + 4 + 3 + 2 + 0 + 1
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The X farthest right is at 11
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The X farthest left is at 5
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The tallest stack of X’s is at 7
Good to know
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Measure each object to the nearest whole unit. Type the first length on the line.
•
Put one X above the number line for each object, at its length.
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The longest and shortest are the X’s farthest right and left. The most common has the most X’s.
Step-by-step
WE KNOW
First length on the line: 5 cm
Objects at the first length: 1
Objects 1 cm longer: 2
Objects 2 cm longer: 4
Objects 3 cm longer: 3
Objects 4 cm longer: 2
Objects 5 cm longer: 0
Objects 6 cm longer: 1
FIND
objects measured, longest length, shortest length, most common length
Step 1 · Find objects measured
? = 1 + 2 + 4 + 3 + 2 + 0 + 1
Count every X on the line plot.
1 + 2 = 3
3 + 4 = 7
7 + 3 = 10
10 + 2 = 12
12 + 1 = 13
Objects measured: 13
Step 2 · Find longest length
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The X farthest right is at ?
Find the last length with an X.
Longest length: 11 cm
Step 3 · Find shortest length
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The X farthest left is at ?
Find the first length with an X.
Shortest length: 5 cm
Step 4 · Find most common length
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The tallest stack of X’s is at ?
Find the tallest stack of X’s.
Most X’s: 4 at 7
Most common length: 7 cm
Check
Put the numbers back in. Both sides should match.
13 = 1 + 2 + 4 + 3 + 2 + 0 + 1 ✓
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The X farthest right is at 11 ✓
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The X farthest left is at 5 ✓
X’s at 5 and on: 1, 2, 4, 3, 2, 0, 1. The tallest stack of X’s is at 7 ✓
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.
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