Question

Calculati:
a) 1 supra 2 - 1 supra 4 + 5 supra 6 - 3 supra 8 = .........
b) 1 intreg 5 supra 6 + 4 supra 3 - 1 supra 2 - 0,(25) = ......
c) 25,3 + 0,7 - 21,(83) - 16 supra 99 = .........
d) 2,71 - 0,8(2) + 1,2(5) + 1 intreg 3 supra 5- o,65(4) = ..........

Answer 1

a)$\frac{1}{2} - \frac{1}{4} + \frac{5}{6} - \frac{3}{8} = \frac{12}{24} - \frac{6}{24} + \frac{20}{24} - \frac{9}{24} = \frac{17}{24}$
b)$1 \frac{5}{6} + \frac{4}{3} - \frac{1}{2} -0,(25)= \frac{11}{6} + \frac{8}{6}- \frac{3}{6} -0,(25)= \frac{16}{6} -0,(25)=[tex]2,(6)-0,(25)=2,66666666666666666...-0,2525252525252525252.....$$=2,(41)$
c)$25.3+0.7-21.(83)- \frac{16}{99} =24.6-21.(83)-0.(16)=$$=24.60000000000......-21.83838383838...=1.2(38)$-0.(16)=1.(76)[/tex]