Am i doing somthing wrong?

jmoore · 2008-01-21 04:38:25

hey all,

i have this question in my test (practice)

Q) If a car is travalling at 64 mph how many miles will it have travalled in 45 minutes?

this is what i did just take 15 minutes away, but it turned at i was wrong the answer is really 48 but i am not sure how they got it, i have even tried taking 15 away then adding from lets say 60 which gives me 45 then adding the 4 back on which gives me 49?

Plz Help

Joe

one more thing am i correct in think that 0.2 can also be written as a half or as 50 as a whole number?

Last edited by jmoore (2008-01-21 04:47:13)

Identity · 2008-01-21 04:44:53

45 minutes = 3/4 hour

miles.

jmoore · 2008-01-21 04:50:37

ok is there an easy way to multiple that for example do 60*3 then 4*4 or not as i find it really difficult to multiply fractions

Last edited by jmoore (2008-01-21 04:50:57)

Daniel123 · 2008-01-21 05:00:24

Just multiply the top two numbers, then mutliply the bottom two numbers

Which is just 192 divided by 4, which gives 48.

Last edited by Daniel123 (2008-01-21 05:01:07)

jmoore · 2008-01-21 05:08:14

I understand now i was not thinking thanks, one more thing lets say if i saw a fraction like 6 over 5 is that the same as 6 divided by 5?

Daniel123 · 2008-01-21 05:09:14

Yup.

Daniel123 · 2008-01-21 05:11:24

Alternatively, you could just find a quarter of 64, and then multiply it by 3, which is probably easier in this question.

jmoore · 2008-01-21 06:05:07

thanks all

Math Is Fun Forum

#1 2008-01-21 04:38:25

Am i doing somthing wrong?

#2 2008-01-21 04:44:53

Re: Am i doing somthing wrong?

#3 2008-01-21 04:50:37

Re: Am i doing somthing wrong?

#4 2008-01-21 05:00:24

Re: Am i doing somthing wrong?

#5 2008-01-21 05:08:14

Re: Am i doing somthing wrong?

#6 2008-01-21 05:09:14

Re: Am i doing somthing wrong?

#7 2008-01-21 05:11:24

Re: Am i doing somthing wrong?

#8 2008-01-21 06:05:07

Re: Am i doing somthing wrong?

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