分析:(1)(3)運(yùn)用加法交換律和結(jié)合律解答,
(2)(7)運(yùn)用乘法分配律解答,
(4)(5)(6)(9)按照先算第二級運(yùn)算,再算第一級運(yùn)算順序解答,
(8)按照從左到右順序解答.
解答:解:(1)37+125+63+175
=(37+63)+(125+175)
=100+300
=400;
(2)75×56-56×28
=(75-28)×56
=47×56
=2632;
(3)688-534+112
=688+112-534
=800-534
=266;
(4)11.8+2.05×7.3
=11.8+14.965
=26.765;
(5)4.15×9.6-3.2
=39.84-3.2
=36.64;
(6)0.43×0.65+0.0215
=0.2795+0.0215
=0.301;
(7)0.65×101
=0.65×100+0.65×1
=65+0.65
=65.65;
(8)50×0.13×0.25
=6.5×0.25
=1.625;
(9)8.4÷0.56+15
=15+15
=30.
點評:(1)依據(jù)四則運(yùn)算計算方法正確進(jìn)行計算,(2)正確選擇并運(yùn)用簡便方法解決問題,是本題考查知識點.