Rates and Unit Rates with Proportional Reasoning.

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Presentation transcript:

Rates and Unit Rates with Proportional Reasoning

Rate – is a ratio that compares two quantities measured in DIFFERENT UNITS  50 minutes & 2 miles  450 miles &15 gallons  120 words & 5 minutes  50 yards & 42 seconds  50 minutes/2mile  450 miles/15gallon  120 words/5minute  50 yards/42 secs

Unit rate - is a rate that has a denominator of miles - 20 gallons $350 – 35 hrs 1,500 miles – 25 hrs $210 – 50 ounces 17 miles/gal $10 /hr 60 miles/hr $4.20 / oz

Determine The Better Buy  Juice 18 oz for $ oz for $.70  Cloth 2 yd for $ yd for $7.78  Juice 1.26/18= $.07 per oz.70/8 = $.0875 per oz  Cloth 3.15 / 2 = $1.575 per yd 7.78 / 6 = $1.296 per yd

Determine The Better Buy  Socks 2 pair for $ pair for $9.97  Cereal 10.2 oz for $ oz for $9.95  Socks 2.99/2 =$1.49 per pair 9.97 / 6 =$1.67 per pair  Cereal 5.98 / 10.2 =$.58 per oz 9.95 /16 = $.62 per oz