2506-10517÷13+14×106
[0.8+0.75×(0.65-0.25)]÷0.01
(4
-1
)÷(
+
)×
1
-2÷(3
×
)÷.0.75+1.32.解:①2506-10517÷13+14×106,=2506-809+1484,
=1697+1484,
=3181;
②[0.8+0.75×(0.65-0.25)]÷0.01,
=[0.8+0.75×0.4]÷0.01,
=[0.8+0.3]÷0.01,
=1.1÷0.01,
=110;
③(4
-1
)÷(
+
)×
,=(3
-1
)÷(
+
)×
,=
÷
×
,=
×
×
,=1
;④1
-2÷(3
×
)÷.0.75+1.32,=1
-2÷2÷.0.75+1.32,=1
-1÷.0.75+1.32,=1
-1
+1.32,=1.32.
分析:根据四则混合运算的运算顺序和计算法则进行计算即可,注意运算定律的使用.
点评:细心计算,灵活使用运算定律进行简算.