can you please help me with math? - XP Math - Forums

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 07-24-2007 #1 Sexii Princess Guest   Posts: n/a can you please help me with math? add 2/7, 5/6, and 3/4 and can you show me how you got the answer? 10 pts.
 07-24-2007 #2 lala 16 Guest   Posts: n/a 157/84 i got it on a graphing calculator. u should get one. they help u a lot
 07-24-2007 #3 Mamushka Guest   Posts: n/a just get the common denominator for all three !!!which is 314 over 168simplify to the lower common denominator and you get 157/84
 07-24-2007 #4 cidyah Guest   Posts: n/a 2/7+5/6+3/4Find a number that is divisible by 7,6 and 4If you multiply 7x6x4=168. Rather, you can use 84.84/7=12: 84/6=14: 84/4=21:[2(12)+5(14)+3(21)]/84=(24+70+63)/84=157/84
 07-24-2007 #5 laid_back_dude Guest   Posts: n/a 2/7 + 5/6 + 3/4the common denominator would be 4*6*7 = 168 now 7*? = 168 ( it's 24, so u multiply 2*24) 6*? = 168 ( 28, so 5*28) 4* ? = 168 ( 42, so 3*42) ( 2*24 + 5*28 + 3*42) / 168 = ( 48 + 140 + 126) / 168= 314 / 168 = 157 / 84 ( 2* 157 = 314 and 2* 84 = 168)
 07-24-2007 #6 confusions Guest   Posts: n/a 2/7+3/4+5/6step 1 : take LCM which is 84nowstep 2:see 12 times 7 is 84 so multiply numerator (2) by 12 do the same with the other two numbers as well 2x12 + 5x 14 + 3x 21 ------------------------------ 84 = (24+70+63)/84 =157/84 1 whole 73/84
 07-24-2007 #8 Gerard Guest   Posts: n/a 2/7 + 5/6 + 3/4 = 157/84First get the LCD. Simplest way is to multiply the denominators.7*6*4 = 168 [(2*6*4) + (5*4*7) + (3*6*7)] / 168[48 + 140 + 126]/168314/168Getting its lowest term we will have157/84
 02-25-2010 #9 jmw106462     Join Date: Feb 2010 Posts: 388 I don't Really know. __________________ Please refrain from sending me frivolous PM's
 03-01-2010 #10 Gdog   Join Date: Jan 2010 Posts: 1 Noooooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!! No I will not help you

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