(1) (2) -1-〔1-(1-0.5×)〕×6(3) (4) (5)(-+)×(-36) (6)
×[-(-)]
1.8×8.6+1.8×1.3+18%
100﹣98+96﹣94+92﹣90+…+76﹣74+72=
11+192+193+19994+199995=
=