x÷318=53 x-3.02=4.18 x×63=5166
4.084+x=9.34 16.3-x=3.75.
分析:(1)依據(jù)等式性質(zhì),兩邊同時(shí)乘318求解,
(2)依據(jù)等式性質(zhì),兩邊同時(shí)加3.02求解,
(3)依據(jù)等式性質(zhì),兩邊同時(shí)除以63求解,
(4)依據(jù)等式性質(zhì),兩邊同時(shí)減去4.084求解,
(5)依據(jù)等式性質(zhì),兩邊同時(shí)加x,再同時(shí)減去3.75求解.
解答:解:(1)x÷318=53,
    x÷318×318=53×318,
              x=16854;

(2)x-3.02=4.18,
x-3.02+3.02=4.18+3.02,
          x=7.2;

(3)x×63=5166,
 x×63÷63=5166÷63,
         x=82;

(4)4.084+x=9.34,
4.084+x-4.084=9.34-4.084,
            x=5.256;

(5)16.3-x=3.75,
   16.3-x+x=3.75+x,
  16.3-3.75=3.75+x-3.75,
          x=12.55..
點(diǎn)評:本題主要考查了學(xué)生依據(jù)等式性質(zhì)解方程能力.
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