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Monday, January 31, 2011
hw #4-1 Ratios and Rates
hw#4-1: Due Wed Feb 2
1) Read pgs 160-61
2) pg 162 #1-7 All, 9-19 Odd, 21-33 multiples of 3
Yup, this assignment was originally due quite a while ago. I put it on the "back-burner" so that we could redo the Unit 6 test. So there should be NO EXCUSES for it not to be done, or at least attempted. You should be familiar enough with rates and ratios that you should be able to read the section (ALL TWO PAGES) and attempt the problems. SPREAD THE WORD to your fellow classmates... I will NOT be pleased if this assignment isn't done AND no one asked any questions on the blog!!!
Take another look at the definitions. A ratio is a comparison of two numbers by division.
A rate is a SPECIAL type of ratio that compares two numbers that are measured in diffent units. One way to recognize a rate in a word problem is that the word "per" is often used.
Examples of rates: miles per hour gallons per minute feet/sec (feet per second) putts per green
So a ratio is not part of a rate... a rate is a special type of ratio.
Ratios can be written as part to whole or part to part. For example, let's say Jill and Tommie run for class president and Jill gets 60% of the votes.
We could say Jill won by a ratio of 60:40 " " " " won by a ratio of 6 to 4 " " " " won with 6/10 of the vote Fully reduced, Jill won with 3/5 of the vote
It's not a rate, because we are using the same unit - a vote.
We already did this a few classes before, but I'm sure you won't assign more cuz you're the bestest teacher in the world.
ReplyDelete-Maggie
Yup, this assignment was originally due quite a while ago. I put it on the "back-burner" so that we could redo the Unit 6 test. So there should be NO EXCUSES for it not to be done, or at least attempted. You should be familiar enough with rates and ratios that you should be able to read the section (ALL TWO PAGES) and attempt the problems. SPREAD THE WORD to your fellow classmates... I will NOT be pleased if this assignment isn't done AND no one asked any questions on the blog!!!
ReplyDeleteIf a ratio can have the same unit, like
ReplyDelete16cm:8cm, then why can't rates have the same unit in them if a ratio is part of a rate.
-Maggie
GOOD QUESTION!!
ReplyDeleteTake another look at the definitions. A ratio is a comparison of two numbers by division.
A rate is a SPECIAL type of ratio that compares two numbers that are measured in diffent units. One way to recognize a rate in a word problem is that the word "per" is often used.
Examples of rates:
miles per hour
gallons per minute
feet/sec (feet per second)
putts per green
So a ratio is not part of a rate... a rate is a special type of ratio.
Ratios can be written as part to whole or part to part. For example, let's say Jill and Tommie run for class president and Jill gets 60% of the votes.
We could say Jill won by a ratio of 60:40
" " " " won by a ratio of 6 to 4
" " " " won with 6/10 of the vote
Fully reduced, Jill won with 3/5 of the vote
It's not a rate, because we are using the same unit - a vote.
Ca-peesh?
Ca-peesh. That makes much more sense now.
ReplyDelete