### Math Work- April 28

Wednesday, April 29, 2009
Question 9-12

Sorry its late

#9
The distance to Grandma's house is 4/5 of the distance to Uncle Glen's house. If Uncle Glen's house is 3 1/2 hours away, how log will it take to get to grandma's house if you travel at the same speed?

This question is saying 4/5 x 3 1/2.
make the mixed number into a improper fraction.
3x2+1= 7
Denominator stays the same, the new fraction is 7/2 now you multiply.
7x4 and 5x2
the fraction should be 28/10
change it back to the mixed number which is now 2 8/10. Simplify into 2 4/5.

It takes 2 4/5 hours to get to grandma's house.

#10
It takes 3/5 of a tank of gas to get to work and back each day. How much gas is used over 5 work days? Show your thinking

3/5 x 5
3 x 5 is 15
denominator stays the same
15/5 simplify into 3

It takes 3L of gas to go to work for 5 days.

#11
Owen is 2 1/4 time as old as Robin. When Robin celebrates his 8th birthday, How old will Owen be?

change the mixed into the improper= 9/4
Multiply by 8... 9/4 x 8
9x8= 72 and the denominator stays the same
equals 72/4 simplify into 18

Owen will be 18 years old.

#12
The Karate club is arranging a grading for its members. It takes 3 1/4 hours to test a group of 4 candidates. How long will the club need the gym in order to process 3 groups of 4 candidates.

3 1/4 x 3
change into a improper = 13/4
multiply by 3.... 13/4 x 3
13 x 3 is 39
denominator stays the same
the fraction is now 39/4 simplify