anonymous
  • anonymous
A student solved this problem and said the answer was 2 1/2 cups. Rhonda picked 6 2/3 cups of blackberries. Her sister picked 4 1/6 How many more cups of blackberries did Rhonda pick than her sister? Is the student's answer reasonable? A. Yes, the answer is reasonable. B. No, the answer is not reasonable. It should be about 1/2 cup. C. No, the answer is not reasonable. It should be about 4 cups. D. No, the answer is not reasonable. It should be about 10 cups.
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous

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anonymous
  • anonymous
welshfella
  • welshfella
6 2/3 - 4 1/6
anonymous
  • anonymous
5/2
welshfella
  • welshfella
convert the 2/3 to 6th's then you can do the subtraction
anonymous
  • anonymous
guide me
kittiwitti1
  • kittiwitti1
\[6\frac{2}{3}-4\frac{1}{6}\]Improper fraction both then make both sixths fractions and subtract
anonymous
  • anonymous
i think its c
anonymous
  • anonymous
i got 5/2
welshfella
  • welshfella
6 - 4 = 2 now you need to calculate 4/6 - 1/6 = ?
welshfella
  • welshfella
add the 2 to the result of the subtraction of the fractions
anonymous
  • anonymous
1/2
anonymous
  • anonymous
1/4
welshfella
  • welshfella
?? 1/2 or 1/4 ?
anonymous
  • anonymous
1/2
welshfella
  • welshfella
right now add the 2 and you have it
kittiwitti1
  • kittiwitti1
Mixed to improper: \[\frac{(6\times4+3)}{3}-\frac {(4\times6+1)}{6}\]
kittiwitti1
  • kittiwitti1
Urgh. I forgot you could solve without improper conversion....
welshfella
  • welshfella
2 + 1/2 = ?
welshfella
  • welshfella
yes - in this case - its easier to just subtract the whole numbers first then the fractions after
kittiwitti1
  • kittiwitti1
I was raised and taught that it was not logical or risky to do that ._.; *I have weird teachers*
welshfella
  • welshfella
yes - you can be too dogmatic here its ok to do that
welshfella
  • welshfella
its perfectly safe as 6 > 4 and 2/3 > 1/6
welshfella
  • welshfella
well freez what do you think the answer is?
anonymous
  • anonymous
B
anonymous
  • anonymous
bbbbbbbbbbbbb
kittiwitti1
  • kittiwitti1
no
kittiwitti1
  • kittiwitti1
it is not b but nice try
anonymous
  • anonymous
c
anonymous
  • anonymous
cc
kittiwitti1
  • kittiwitti1
No... what answer did you get from what @welshfella told you?
welshfella
  • welshfella
all you have to do is calculate 2 + 1/2
kittiwitti1
  • kittiwitti1
Yes, and the answer is neither B nor C ; ;
anonymous
  • anonymous
a
kittiwitti1
  • kittiwitti1
...yes. It's A. ; ;

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