Odpowiedzi

2009-10-14T17:28:57+02:00
A= 1 7/20 : 2,7 + 2,7 :1,35 = 1,35:2,7 +2,7:1,35 = 0,5+2 = 2,5
b= 2 ½ : 10 +10 :2 ½ = 0,25+4 = 4,25

b/a=?

4,25/2,5*100% = 1,7*100% = 170%
2009-10-14T20:16:12+02:00
A=1 7/20÷2,7+2,7÷1,35=27/20÷27/10+27/10÷135/100=27/20*10/27+27/10*100/135=1/2+2=1/2+4/2=5/2=2 1/2
b=2 1/2÷10+10÷2 1/2=5/2*1/10+10*2/5=1/4+4/1=1/4+16/4=17/4=4 1/4

17/4÷5/2=17/4*2/5=17/10

17/10*100%=170%