Transcript Ratios

Ratios
SOL 6.1
By Kathy Woodard
2011
Warm-up 1
Practice multiplication facts at http://www.aaastudy.com/mul39ex2.htm
Now use this site to answer question #1: http://illuminations.nctm.org/ActivityDetail.aspx?ID=64
1.
List the Factors of the Number
Is it prime or
composite?
Is it a perfect square?
25
24
100
13
2. Simplify each fraction:
25

100
60

100
16

100
15

25
8

24
9

24
3. Evaluate each expression:
8  3(5  14 )
3  2(9  6)
4. Write the next 3 terms in each pattern:
102  (9  7  1)5
23  (7 2  60 )
64, 32, 16, 8, ______, _______, _______
14, 21, 28, 35, ______, ______, _______
5

13
“Bad Date” Video
http://www.schooltube.com/video/0004acc0553
a4d7ab592/Matrix-Learning-Bad-Date-byNMSU
SOL 6.1 Ratios
compare two sets of data
(part to whole, or part to part)
a/b
a
or b
a to b

a:b
Part to Part Ratios
What is the ratio of red
cubes to green cubes?
2 to 1
2:1
2
2/1 or 1
Part to Whole Ratios
What is the ratio of red
cubes to all the cubes?
2 to 5
2:5
2/5 or
2
5
Simplify a Ratio
A ratio can be simplified like a fraction.
Ratio of red cubes to all the cubes:
2 to 6
2:6
2
6
1 to 3
Simplifies to
1:3
1
3
http://www.brainpop.com/math/ratioproportiona
ndpercent/ratios/
12 2 6
 
10 2 5
4
3
/
/
/// 1000 ml
500
1000
50

100
5

10
1

2
Be careful about the order!
What is the ratio of mice to cats?
5
3
or
3
5
Write the ratio with words
& then fill in the numbers:
Mice = 3
Cats
5
7:14
14
7
1


28
14
2
butter to flour?
200
250
20

25
4

5
What is the ratio of…
•Cats to Hamsters at Pet Place?
•Dogs at Your Zoo to dogs at Pet Place?
•All pets at Pet Stop to all pets at Your Zoo?
Hamsters
Dogs
Cats
Pet Place
4
2
3
Your Zoo
7
10
9
Pet Stop
3
7
5
08 SOL
The ratio of boys to girls in Room
B is 15 to 12. What is the ratio of
girls to total students in Room B?
What is the ratio of Zizu’s miles run to Mark’s miles run?
What is the ratio of Kaya’s miles run to Jim’s miles run?
What is the ratio of
snickers to m&ms?
12
5
What is the ratio of
snickers to all the candy?
12 12 1

48 12 4
Ratio of shaded squares to
total squares:
50 50 1

100 50 2
Ratio of shaded squares to
unshaded squares:
Ratio of shaded squares to
total squares:
Ratio of shaded squares to
unshaded squares:
Ratio of total squares to
shaded squares:
06 SOL
According to the table, what is
the ratio of the number of B’s
Camelia earned to the number
of A’s she earned?
07
SOL
06 SOL
09 NS 6.1 Ratios
10 NS 6.1 Ratios
Number &
Number
Sense
6.1 The student will describe and compare data,
using ratios, and will use appropriate notations,
such as ab, a to b, and a:b.
Math Is Fun
Good
explanation
and several
real life
examples.
http://www.mathsisfun.com/numbers/ratio.html
Number &
Number
Sense
6.1 The student will describe and compare data,
using ratios, and will use appropriate notations,
such as ab, a to b, and a:b.
Math Is Fun
Good
explanation
and several
real life
examples.
http://math.rice.edu/~lanius/proportions/index.html
Number &
Number
Sense
6.1 The student will describe and compare data,
using ratios, and will use appropriate notations,
such as ab, a to b, and a:b.
Arcademic
Think quick
and find the
equivalent
ratio.
http://www.arcademicskillbuilders.com/games/ratiostadium/ratio-stadium.html