解:①16.625-(6

+3.3),
=16.625-6.625-3.3,
=10-3.3,
=6.7;
②(2

+0.75×4)÷(1-

),
=

×

,
=

,
=9

;
③3.35×8.4×2+6.7×1.6,
=(3.35×2)×8.4+6.7×1.6,
=6.7×(8.4+1.6),
=6.7×10,
=67;
④7

-4.28×(0.375-

),
=7.2-4.28×

,
=7.2-1.07,
=6.13;
⑤6

+7.2+3

+2.8,
=(6

)+(7.2+2.8),
=10+10,
=20;
⑥10.6-(6

+

÷12.5%),
=10.6-7.6,
=3.
分析:①运用一个数减去两个数的和,可以用这个数分别减去这两个数.
②④⑥按照分数四则混合运算的顺序进行计算即可,先计算括号内部的再计算括号外面的.
③先计算3.35×2=6.7,再运用乘法的分配律进行计算.
⑤运用加法的结合律,交换律进行计算,是计算更加简便.
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.