
By: chino (offline) Friday, October 14 2011 @ 09:09 PM CDT (Read 1964 times)



chino 
Mrs Jones bought 4/5 kg of meat.
She gave 1/5 kg of the meat to Mrs Singh and 2/5 kg of the meat to Mrs Smith.
(a) What fraction of the meat did she give away in all?
(b) What fraction of the meat did she have left?
My answer is
4/ 5kg = 800g
1/5 kg = 200g
2/5 kg = 400g
(a) 200 + 400 = 600
600/800 = 3/4
(b) 800600 = 200
200 / 800 = 1/4
My answer did not agree with the model answer. model answer is 3/5 and 1/5.
Im v confused.
To me, 1/5 kg of the meat and 1/5 of the meat is NOT SAME right?
Please enlighten me. Thanks

Newbie
Registered: 03/14/10 Posts: 14





myluckystar111 
Hi,
Mrs Jone bought 4/5 kg of meat
Show this by drawing a bar model represented by total of 4 units
So each unit is equivalent to 1/5 (not 1/5 kg)
(a) 1 unit to Mrs Singh + 2 units to Mrs Smith > 3 units which is 3/5 of the meat given away in total
(b) 1 unit left > 1/5 of the meat is left
Hope this helps.

Junior
Registered: 09/05/11 Posts: 15





By: Andrew Tham (offline) Monday, May 20 2013 @ 02:56 AM CDT



Andrew Tham 
Chino is correct. The question asked what fraction of the meat is given away.
Even if you draw a model showing 4 parts, each part is 1/5 kg. Since 1/5kg (1 part) is given away to Mrs Singh and 2/5kg(2 parts) are given away to Mrs Smith, total parts given away is 3 parts. Fraction of meat given away is 3/4.
Similaryly, fraction of meat remaining is 1/4.
Question didn't ask how much (or what is the weight) given away or remaining.

Newbie
Registered: 04/23/12 Posts: 2



