解:①(125+9)×8,
=125×8+9×8,
=1000+72,
=1072;
②11.84-7.96-3.04,
=11.84-(7.96+3.04),
=11.84-11,
=0.84;
③(124-85)×6÷26,
=39×6÷26,
=234÷26,
=9;
④125×72×4,
=(125×8)×(9×4),
=1000×36,
=36000;
⑤49.62+27.17-19.62,
=49.62-19.62+27.17,
=30++27.17,
=57.17;
⑥3.27+6.4+2.73+4.6,
=(3.27++2.73)+(6.4+4.6),
=6+11,
=17.
分析:①(125+9)×8利用乘法的分配律计算简便;
②11.84-7.96-3.04利用一个数连续减去两个数等于这个数减去这两个数的和计算简便;
③(124-85)×6÷26按四则混合运算运算顺序先做(124-85),在做乘,最后算除;
④把72变成8×9,125×72×4利用乘法的交换律和结合律变成(125×8)×(9×4)计算简便;
⑤49.62+27.17-19.62利用加法的交换律和结合律变成49.62-19.62+27.17;
⑥3.27+6.4+2.73+4.6利用加法的交换律和结合律变成(3.27++2.73)+(6.4+4.6)计算简便.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.