Question

Sa se efectueze:
a) (-2/3) * (-5/6) * (-9/10) =
b) (-2/19) * (-5/3) * (-18/12)=
c) -5/6 * 345/575 - 137/138 * (-414/548)=
d) 0,27 * 50 + 270 : 0,25 - 0,(42) : 1,2(34)=

Answer 1

a)$\frac{-2*(-5)*(-9)}{3*6*10} =- \frac{1}{2}$

b) [tex] \frac{-2*(-5)*(-18)}{19*3*12} =- \frac{5}{19} [/tex]

c)$- \frac{1}{2} + \frac{3}{4} = \frac{-2+3}{4} = \frac{1}{4}$

d)$\frac{27}{100}*50+ 270: \frac{25}{100}- \frac{42}{99} : \frac{1234-12}{990}=$

$\frac{27}{2} +270* \frac{100}{25} - \frac{42}{99} * \frac{990}{1222} =$

$\frac{27}{2} +1080- \frac{210}{611}=$

$\frac{27*611}{2*611} + \frac{1080*1222}{1222} - \frac{210*2}{611*2} =$

$\frac{16497+1319760-420}{1222} = \frac{1335837}{1222}$