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RATIOS & PROPORTIONS RATIOS & PROPORTIONS RATIOS in addition to PROPORTIONS REVIEW
California State University, Chico, US has reference to this Academic Journal, RATIOS in addition to PROPORTIONS REVIEW By: Teachers who care! RATIOS & PROPORTIONS A ratio is a comparison of two numbers by division. To write ratios, use the word to, a colon, or a fraction bar. EXAMPLE #1: John read 3 books in 4 days. Write the ratio of books so that days. Words: 3 so that 4 Colon: 3:4 Fraction: 3/4 RATIOS & PROPORTIONS A proportion is a statement that two ratios are equal. EXAMPLE#2: Is a proportion? Find the cross products. 30 = 30 TRUE If TRUE, the statement is a proportion.
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RATIOS & PROPORTIONS EXAMPLE#3: Is a proportion? Find the cross products. 20 = 21 FALSE If FALSE, the statement is NOT a proportion. RATIOS & PROPORTIONS EXAMPLE#4: Solve the proportion: Find the cross products. 10 Divide both sides by 10. RATIOS & PROPORTIONS There are 5 boys in addition to 6 girls in Grant School. 1. What is the ratio of girls so that boys using a fraction? 2. What is the ratio of girls so that children in Grant School (use a colon)? 6:11 3. What is the ratio of boys so that children in Grant School (use words)? 5 so that 11
RATIOS & PROPORTIONS Are the following proportions? FALSE ? Not a proportion FALSE ? Not a proportion TRUE ? this is a proportion TRUE ? this is a proportion RATIOS & PROPORTIONS Find the missing numbers so that make the following proportions. 9 9 10 10 SCALE DRAWINGS A scale drawing is a drawing of an object alongside dimensions proportional so that those of the actual object. To find lengths from scale drawings, set up in addition to solve proportions.
ProtecT study Recruitment in addition to case-finding Case-finding up so that October 2005 PCC attended June-August 2005 PCC attended last 12 months Total study accrual Randomisations 2001-2005 Randomisation Randomisation in 2005 Acceptance of allocation by arm Acceptance of allocation by arm Acceptance of allocation by arm Acceptance of allocation last 6 months By centre in consideration of the last year Randomisations in 2005 Randomisation by centre last 6 months Randomisation by centre last 6 months Follow-up Follow-up: treatment schedules Follow-up: treatment schedules 6 month questionnaire follow-up Questionnaire follow-up Schedule follow-up Schedules August – August Exclusions in ProtecT Exclusions at PCC in addition to Consent 3 Maximum exclusions in ProtecT Exclusions at PCC: June-Sept Protocol changes in addition to Information sheet II Protocol 2.2 Protocol 2.2: Treatments Information sheet II
SCALE DRAWINGS USING PROPORTIONS EXAMPLE#1: 1/4 in = 5 ft is a scale in consideration of a rock band?s concert stage. A. The scale length of the drum stand is 1 in. What is the actual length of the drum stand? Cross multiply. .25 .25 Divide by .25 SCALE DRAWINGS USING PROPORTIONS EXAMPLE#2: ¬ in = 5 ft is a scale in consideration of a rock band?s concert stage. B. The actual length of the stage is 60 ft. What is the scale length of the stage? Cross multiply. 5 5 Divide by 5 SCALE DRAWINGS USING PROPORTIONS Given a scale of « in = 4 ft, find the actual length in consideration of each scale length given. .5 .5 .5 .5
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