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Need helpp MEdalls!!!
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TrashMan914
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Okay, if you say so.
twitch
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hang on imma draw my problem
evansda
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Lol
twitch
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\[-4\frac{ 3 }{ 5 }-2\frac{ 1 }{ 2 }\]
twitch
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I dont understad how to simplify these problems
twitch
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Id rather know how to do this problem then relie on a caculator
twitch
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dude uve been typing for the past 20 minutes are you gonna help me?
akhaliq99
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-71/10
akhaliq99
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changed mixed numbers to improper fractions
akhaliq99
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so -(23/5)-(5/2)=-(46/10)-(25/10)=-71/10
twitch
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but I have like 20 more of those to answer so I was hopeing somebody can show me the steps so I can copy the procedure on the other problems
akhaliq99
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ok multiply 5 by 4 and then add 3 for first fraction to get -23/5
Benbburn
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the quickest way to think about it is to multiply the denominator by the whole number the add the numerator. the get common denominators before anyting else
akhaliq99
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you get the numerator that way over the same denominator
Benbburn
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so like x(a/b) = (bx+a)/b
akhaliq99
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do same for second fraction to end up with improper fractions
twitch
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so I have to find the common denominator before anythiing
Benbburn
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i would get them to imporper fractions before common denominators
akhaliq99
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yes then find common denominator if it is not already there.
akhaliq99
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first. convert mixed number to improper fraction
second. get common denominator if needed
third. solve
twitch
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okay so it should be 12/5 -2/2
twitch
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then the denominators should be 10 right
akhaliq99
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no \[4 \frac{ 3 }{ 5 }\]
akhaliq99
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becomes 23/5
twitch
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how did you get 23
akhaliq99
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because 5*4 is 20 and then add 3 to get 23
akhaliq99
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that is new numerator
akhaliq99
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and denominator stays the same
twitch
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oh okay so let me try again
twitch
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23/5 - 5/2
akhaliq99
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yes thats right but dont forget the minus signs
twitch
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okay the 23/5 would be negative right ?
akhaliq99
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yes
akhaliq99
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because 4(3/5) was negative
akhaliq99
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the number is the same just converted to make it easier to do computations
akhaliq99
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type in calculator and see you get the same number
twitch
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-(23/5) -5/2 and the common denominator would be ten right
akhaliq99
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also 5 goes into 23 4 times plus some remainder which is the fraction
akhaliq99
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yes
twitch
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okay i got that
twitch
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so were do i go from there
akhaliq99
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just subtract the numerators and get the solution
twitch
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18/10
akhaliq99
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the denominator stays the same so -71/10
twitch
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how did you get 71
akhaliq99
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when you multiplied to get common denominator what did you get?
akhaliq99
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-46/10-25/10=-71/10
twitch
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I did'nt multipy anything
akhaliq99
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do u see how I got that
twitch
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you cross multiplyed?
akhaliq99
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multiply top and bottom for -23/5 by 10 and then multiply top and bottom of 25/10 by 2 to get 46/10 and 25/10
akhaliq99
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oh sorry I wrote that wrong ignore it
akhaliq99
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so -23/5 by 2/2 and -5/2 by 5/5
twitch
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okay I see
twitch
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so -71/10
akhaliq99
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do you get it?
twitch
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yea
twitch
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-71/10 right and that can be simplified
akhaliq99
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yes correct!
twitch
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cool thanks man
akhaliq99
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no problem take care
twitch
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you too
twitch
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do you see what i mean