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Minds On (Warm Up) Write your answers on a whiteboard before checking the answer!

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Write the ratio for shaded parts to non-shaded parts. 3 : 5 click

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Write the ratio for shaded to TOTAL number of parts. 3 : 8 click

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Dr. Ruiz has 7 snails and 3 fish in his aquarium. What is the ratio of fish to snails? A7 : 3 B7 : 10 C3 : 7 D3 : 10

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Answer: C

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What is the ratio of snails to the total number of animals? A7 to 3 B7 to 10 C3 to 7 D3 to 10

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Answer: B

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If Dr. Ruiz adds 2 fish to this tank, what is the new ratio of guppies to the total number of animals? A1 to 2 B5 to 12 C3 to 7 D3 to 10

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Answer: B

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Bella has stickers on the front of her folder. Use the stickers to answer the questions. What is the ratio of to ? A6 : 1 B1 : 6 C1 : 2 D6 : 7

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Answer: A

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What is the ratio of to total number of stickers? A4 : 15 B4 : 19 C1 : 5 D4 : 9

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Answer: B

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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

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Answer: A

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Equivalent Ratios Write your answers on a whiteboard before checking the answer!

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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

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is equivalent to A True B False

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Answer: A (true)

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is equivalent to A True B False

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Answer: B (false)

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is equivalent to A True B False

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Answer: B (false)

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Which ratio is equivalent to ? A B C D

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Answer: B

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Jude swims 1 lap for every 3 laps that Avery swims. Which table shows this relationship? A B C Jude15913 Avery371317 Jude15913 Avery3254565 Jude15913 Avery3152739

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Answer: C

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What value goes in the empty box for the ratio table below? 1234 510?20

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Answer: 15

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What value goes in the empty box for the ratio table below? 2468 7?2128

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Answer: 14

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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. Red139153060150 White1/3135102050

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Red139153060150 White1/3135102050 9 1/3 15 10 60 50 Answer:

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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.

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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.

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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.

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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:63 9 x 7 = 63, so n = 2 x 7 = 14. She got 14 questions incorrect. Answer: 63 + 14 = 77 There must have been 77 questions on the test.

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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.

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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. 29 418 627 836 1045 Answer: See sample table.

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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.

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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 = 24 12 x 9 = 108 Josie got 108 problems correct if she had 24 wrong.

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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?)

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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 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 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

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RATIOS AND RATES.

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