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Minds On(Warm Up)
Write your answers on a whiteboard before
checking the answer!
Write the ratio for shaded parts to non-shaded parts.
3 : 5click
Write the ratio for shaded to TOTAL number of parts.
3 : 8click
Dr. Ruiz has 7 snails and 3 fish in his aquarium. What is the ratio of fish to snails?
A 7 : 3
B 7 : 10
C 3 : 7
D 3 : 10
Answer: C
What is the ratio of snails to the total number of animals?
A 7 to 3
B 7 to 10
C 3 to 7
D 3 to 10
Answer: B
If Dr. Ruiz adds 2 fish to this tank, what is the new ratio of guppies to the total number of animals?
A 1 to 2
B 5 to 12
C 3 to 7
D 3 to 10
Answer: B
Bella has stickers on the front of her folder. Use the stickers to answer the questions. What is the ratio of to ?
A 6 : 1
B 1 : 6
C 1 : 2
D 6 : 7
Answer: A
What is the ratio of to total number of stickers?
A 4 : 15
B 4 : 19
C 1 : 5
D 4 : 9
Answer: B
Mrs. Heller's class has 14 girls and 13 boys. What is the ratio of boys to total number of students?
A
B
C
D
Answer: A
Equivalent Ratios
Write your answers on a whiteboard before
checking the answer!
Equivalent ratios have the same value
1 : 4 is equivalent to 2 : 8
3 to 2 is equivalent to 27 to 18
5 35 7 is equivalent to 49
is equivalent to
A True
B False
Answer: A (true)
is equivalent to
A True
B False
Answer: B (false)
is equivalent to
A True
B False
Answer: B (false)
Which ratio is equivalent to ?
A
B
C
D
Answer: B
Jude swims 1 lap for every 3 laps that Avery swims. Which table shows this relationship?
A
B
C
Jude 1 5 9 13
Avery 3 7 13 17
Jude 1 5 9 13
Avery 3 25 45 65
Jude 1 5 9 13
Avery 3 15 27 39
Answer: C
What value goes in the empty box for the ratio table below?
1 2 3 4
5 10 ? 20
Answer: 15
What value goes in the empty box for the ratio table below?
2 4 6 8
7 ? 21 28
Answer: 14
Alexis wants some pink paint. In order to make the pink paint she needs 3 parts red paint to 1 part white paint. Complete the chart showing the amounts she could use.
Red 1 3 9 15 30 60 150
White
1/3 1 3 5 10 20 50
Red 1 3 9 15 30 60 150
White
1/3 1 3 5 10 20 50
9
1/3
15
10
60
50
Answer:
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
a) Use equivalent fractions to find how many she got correct if she got 8 problems wrong.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
a) Use equivalent fractions to find how many she got correct if she got 8 problems wrong.
Answer: 2 = 8 9 x
2 x 4 = 8, so if I also multiply the bottom by 4, x = 36!
Josie got 36 problems correct.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
b) Use multiplication to find how many she got incorrect if she correctly answered 63.
c) Use your answer from b) to determine how many questions were on the test.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
b) Use multiplication to find how many she got incorrect if she correctly answered 63.
c) Use your answer from b) to determine how many questions were on the test.
Answer: 2:9 = n:639 x 7 = 63, so n = 2 x 7 = 14. She got 14 questions incorrect.
Answer: 63 + 14 = 77There must have been 77 questions on the test.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
d) Use a table to list four more equivalent ratios.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
d) Use a table to list four more equivalent ratios.
2 9
4 18
6 27
8 36
10 45
Answer: See sample table.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
e) Use a tape diagram to determine how many problems she solved correctly if she got 24 incorrect.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
e) Use a tape diagram to determine how many problems she solved correctly if she got 24 incorrect.
12
1212121212 1212
12
12 12
= 24
12 x 9 = 108
Josie got 108 problems correct if she had 24 wrong.
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
f) Read this question carefully – you will need to think a bit differently from the previous question =)
Use a tape diagram to determine how many problems she solved incorrectly if the total number of questions on the test was 88. (hint: first determine the ratio of incorrect questions to total questions?)
On a test, the ratio of the number of problems Josie got incorrect (wrong) to the number of problems she got correct is 2:9.
f) Read this question carefully – you will need to think a bit differently from the previous question =)
Use a tape diagram to determine how many problems she solved incorrectly if the total number of questions on the test was 88. (hint: first determine the ratio of incorrect questions to total questions?)
8
88888 88
8
8 8 = 72
If the total number of questions on the test is 88, then each box must be worth 8, as there are 11 in total.
= 16
