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1.calculati 17% din:
a)2400
b)52400
c)12300
d)7100
2.Determinati fractia [tex] \frac{a}{b} [/tex],stiind ca fractia este egala cu [tex] \frac{ 2}{3 } [/tex] si ca a+b=10


Răspuns :

a)[tex] \frac{17}{100} x2400= \frac{17x2400}{100} = \frac{40800}{100} =408 [/tex]
b)[tex] \frac{17}{100} x52400= \frac{17x52400}{100} = \frac{890800}{100} =8908[/tex]
c)[tex] \frac{17}{100} x12300= \frac{17x12300}{100} = \frac{209100}{100} =2091[/tex]
d)[tex] \frac{17}{100} x7100= \frac{120700}{100} =1207[/tex]
2)[tex] \frac{a}{b} = \frac{2}{3} [/tex]
a=2K
b=3K
a+b=10
2K+3K=10
5K=10
K=10:5
K=2
a=2x2⇒a=4
b=2x3⇒b=6