## anonymous one year ago Matt is making cookies. He adds 3 over 4 cup of sugar to a bowl. He then removes two 1 over 8 cups of sugar. Which of the following best explains the amount of sugar left in the bowl?

1. anonymous

tal tal the multiple choices are too long and i cant copy and paste sorry

2. Tal_Tal

Well you subtract 3/4 and 1/8 do you know how?

3. anonymous

nope

4. Tal_Tal

okay let me try to explain this hold on

5. anonymous

no prob

6. Tal_Tal

1/8 = 1/8 - you're set for the first one. 3/4 x 2/2 = 6/8 - all I did there was multiply the fraction by '1' only in the form of '2/2.' 1/8 - 6/8 Just subtract the numerators. -5/8 -- ANSWER. Hope this helped, and good luck!! :)

7. anonymous

that is not one of my multiple choices so idk.....

8. Tal_Tal

Oh can you just put the numbers for your choices

9. anonymous

3/8,3/8, 4/8, 4/8

10. mathstudent55

@Tal_Tal An important part of solving a math problem is getting an answer that makes sense. The problem states that a person added an amount of sugar to a bowl. Then some sugar was removed from the bowl. You can end up with some sugar or no sugar in the bowl, but your answer of a negative amount makes no sense because it has no meaning in the real world. That means your answer cannot be correct.

11. mathstudent55

@abby1012 I'm trying to understand the problem. At first, 3/4 cup of sugar was added to the bowl, right?

12. Tal_Tal

Thank you for pointing that out I'll keep that in mind next time!

13. anonymous

um okay so if his own is wrong what is it ?

14. anonymous

yes @mathstudent55 but it has because and then it has numbers sorry cant copy and paste

15. mathstudent55

3/4 cup was added to the bowl. The 2 amounts of 1/8 cup each were taken from the bowl. Is this what the problem is telling you?

16. mathstudent55

@abby1012 It's ok. That's why I'm asking to make sure I understand the problem before I try to help you.

17. anonymous

yes i guess

18. anonymous

Matt is making cookies. He adds 3 over 4 cup of sugar to a bowl. He then removes two 1 over 8 cups of sugar. Which of the following best explains the amount of sugar left in the bowl?

19. anonymous

that is all i can copy and paste

20. mathstudent55

\(\sf He ~adds ~3/4 ~cup ~of ~sugar ~to ~a ~bowl.\) \(\sf He ~then ~removes ~\color{red}{two}~ 1/8 ~cups ~of ~sugar.\)

21. anonymous

@vzfreakz

22. anonymous

yip

23. mathstudent55

|dw:1444240879406:dw|

24. anonymous

yes

25. Tal_Tal

Mathstudent can you help me with my question once you are done? thank you!!

26. mathstudent55

That means this is the calculation we need to do. |dw:1444241012258:dw|

27. mathstudent55

@Tal_Tal yes

28. anonymous

@vzfreakz

29. anonymous

and @mathstudent55 yes

30. mathstudent55

Since we are subtracting fractions, we need a common denominator. The LCD of 4 and 8 is 8, so we will use a common denominator of 8 for all 3 fractions.

31. mathstudent55

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32. anonymous

ok

33. mathstudent55

@abby1012 Do you follow so far?

34. anonymous

yip i am still folowing

35. mathstudent55

When we subtract fractions, we subtract the numerators and just keep the common denominator.

36. mathstudent55

|dw:1444241197965:dw|

37. mathstudent55

What is 6 - 1 - 1 ?

38. mathstudent55

|dw:1444241249035:dw|

39. mathstudent55

|dw:1444241288309:dw|

40. anonymous

it is equal 4

41. mathstudent55

Correct. 6 - 1 - 1 = 4, so our numerator is now 4. The denominator is 8, so we have 4/8

42. anonymous

yip i see four over 8 on my multiple choice

43. anonymous

thanks i get it

44. mathstudent55

Since we now have 4/8, we need to reduce the fraction. We notice that both 4 and 8 are divisible by 4, so we can divide the numerator and denoninator by 4.

45. mathstudent55

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46. anonymous

my multiple choice just wants 4/8 and why is it 4/8

47. mathstudent55

There is no 1/2 in your choices?

48. anonymous

no

49. mathstudent55

Then 4/8 is correct.

50. anonymous

but thanks u helped alot

51. mathstudent55

You're welcome.