Thursday, October 18, 2007

Judy's First Growing Post

3) Which is Larger 1/2 + 1/6 or 1/4 + 7/12 ???


Using Clocks



-We find out 1/2 is 30 minutes because 60(min) divided by 2 is 30.
-Then 1/6 of 60 (min) is 60/6=10 minutes
-We can divide 60 by both 6 and 2 to get 1/6 and 1/2 because they're unit fractions
-now add 30+10=40
-1/2+1/6=40/60



since 1/4 is a unit fraction,all we have to do is divide 60(min) by 4 and the answer will = 1/4
60/4=15
-to find 7/12, we could do it two ways.
first, we could divide 60 by 12=5, then 5x7 because it's 7/12 not 1/12. 5x7=35
OR because there are 12 numbers on a clock, and each # =5 minutes,we go to the #7 and then 7x5=35
-Now add 15+35=50
-1/4+7/12=50/60
1/2+1/6 <>




4& 5) Judy And Nikki's Bike race

Two Things About Our Bikerace
-instead of putting a marker on every 12th of the course, we put it on every 12 km... the same with all the other markers.
-we used multiples of the number between 1-60 to find out where to put each colour









6) http://www.jamit.com.au/welcome.html
This site is a great site to learn fractions with because it teaches you different kinds of fractions like improper, equivalent etc. through many lessons. For each different lesson, it gives you a game to practice your skills, and at the very end, there's a test to find out what you've learned. So this site is a fun yet educational way to learn about fractions.
7) Find 1/12 , 1/6, or 1/3 of the 60 km bike race
For an example, if you're looking for every 3rd of the course, you have to divide 60 by 3=20 so every 20th km, is a marking for 1/3 of the course.
The km marked 1/3 are:
20
40
60
I notice that the numbers are increasing by 20 and they are consecutive numbers on the 20 times table like 20x1=20, 20x2=40, 20x3=60. The same patterns are for every 1/12 and 1/6 as well.... just with different numbers.
8) 2 different ways to find 1/4 and 3/4 of a 16
1/4:
-to find 1/4 of 16, you could divide it by 4, and the quotient would be 1/4 of 16. Dividing 16 by 4 to find 1/4 only works because 1/4 is a unit fraction. So 16/4=4
-Since 1/4 is 1/2 of 1/2, first divide 16 by 2, then the answer by 2 again: 16/2=8 8/2=4
4 is 1/4 of 16
3/4:
-first find 1/4 of 16, 16/4= 4 then multiply 4 by 3 because 4 is only 1/4 of 16, and we need 3/4. 4x3=12
-first find 2/4 of 16 which is the same as 1/2. To do that, divide 16 by 2. 16/2=8.
Now divide 8 by 2 to get 1/4. 8/2=4
Now add that 2/4 and 1/4 together to get 3/4. 8+4=12
12 is 3/4 of 16
9) 8/24 or 2/9 which is larger?
-when you first look at it, you'd think 2/9 is larger because the numerator, 2 is only 7 away for the denominater, 9, while for 8/24, 8 is 16 away from 24.
-but if you turn 8/24 to its simplest form, 1/3, then draw the two fractions, 2/9 and 1/3 then compare them:
Then you can see that 8/24, or 1/3 is larger than 2/9.
8/24 is larger.







3 comments:

judy817 said...

for 1/2+1/6 <> it's suppose to say 1/2+1/6 < 1/4+7/12
.....it won't change when i edit it so i'm writing it as a comment.

judy817 said...

Title 1/1
Label 1/1
Question 3 5/5
Question 4/5 2/3
Question 6 5/5
Question 7 3/3
Question 8 5/5
Question 9 5/5
Question 10 7/7
Total 34/35

I think I explained it well by using both words and pictures, but I could improve on showing how to get each ansnwer a few more different ways.

xaznbabix817 said...

Title 1/1
Label 1/1
Question 3- 5/5
Question 4- 5/5 3/3
Question 6- 5/5
Question 7- 3/3
Question 8- 5/5
Question 9- 5/5
Question 10- 7/7

Total 35/35

good job! perfect mark! :):):) i think you did everything very well. it was organized and easy to read and you explained it thourghly and used pictures too. and the page was colorful too! LOl ;) i don't think you need to pimprove on anything cause everything looks good to me :)