分析:(1)先算小括号里面的减法,再算中括号里面的减法,最后算除法;
(2)根据加法交换律和结合律进行计算;
(3)根据乘法分配律进行计算;
(4)根据乘法分配律进行计算.
解答:解:(1)
÷[-(-)],
=
÷[-],
=
÷
,
=
;
(2)
38-15.38+61.25-4.62,
=(38
+61.25)-(15.38+4.62),
=100-20,
=80;
(3)
×5.65+3.35×+,
=
×(5.65+3.35+1),
=
×10,
=
;
(4)125×83-25×15,
=(25×5)×83-25×15,
=25×415-25×15,
=25×(415-15),
=25×400,
=10000.
点评:此题主要考查分数、整数、小数的四则混合运算的运算顺序和应用运算定律进行简便计算.