Transcript Mean Notes

Mean
Vocabulary Review
• Sum – the answer to an
addition problem.
• Addend – the numbers you
added together to get the
sum.
6 + 9 = 15
Copyright © 2000 by Monica Yuskaitis
Definition
Mean
Means
Average
Copyright © 2000 by Monica Yuskaitis
Definition
• Mean – the average of a
group of numbers.
2, 5, 2, 1, 5
Mean = 3
Copyright © 2000 by Monica Yuskaitis
Mean is found by evening out
the numbers
2, 5, 2, 1, 5
Copyright © 2000 by Monica Yuskaitis
Mean is found by evening out
the numbers
2, 5, 2, 1, 5
Copyright © 2000 by Monica Yuskaitis
Mean is found by evening out
the numbers
2, 5, 2, 1, 5
mean = 3
Copyright © 2000 by Monica Yuskaitis
How to Find the Mean of a
Group of Numbers
• Step 1 – Add all the numbers.
8, 10, 12, 18, 22, 26
8+10+12+18+22+26 = 96
Copyright © 2000 by Monica Yuskaitis
How to Find the Mean of a
Group of Numbers
• Step 2 – Divide the sum by
the number of addends.
8, 10, 12, 18, 22, 26
8+10+12+18+22+26 = 96
How many addends are there?
Copyright © 2000 by Monica Yuskaitis
How to Find the Mean of a
Group of Numbers
• Step 2 – Divide the sum by
the number of addends.
# of addends
16
6) 96
6
36
36
Copyright © 2000 by Monica Yuskaitis
sum
How to Find the Mean of a
Group of Numbers
The mean or average of these
numbers is 16.
8, 10, 12, 18, 22, 26
Copyright © 2000 by Monica Yuskaitis
What is the mean of these
numbers?
7, 10, 16
11
Copyright © 2000 by Monica Yuskaitis
What is the mean of these
numbers?
2, 9, 14, 27
13
Copyright © 2000 by Monica Yuskaitis
What is the mean of these
numbers?
1, 2, 7, 11, 19
8
Copyright © 2000 by Monica Yuskaitis
What is the mean of these
numbers?
26, 33, 41, 52
38
Copyright © 2000 by Monica Yuskaitis