a, 1864- 2,76 x9,5 - 16,5 : 2,5
= 1864- 26,22 -6,6
= 1837,78 -6,6
=1831,18
b, ( 675,98 + 888,66 + 111,34) x0,01
= 1675,98 x 0,01
= 16.7598
c, 564,7 x( 9,3 : 2,5 + 8,2 ) - 0,465
= 564,7 x11,92 - 0,465
=6731,224 - 0,465
= 6730,759
d, S = \(\dfrac{1}{2}+\dfrac{1}{4}+\dfrac{1}{8}+\dfrac{1}{16}+\dfrac{1}{32}\)
S = \(\dfrac{16}{32}+\dfrac{8}{32}+\dfrac{4}{32}+\dfrac{2}{32}+\dfrac{1}{32}\)
S= \(\dfrac{31}{32}\)