1740-1632÷16×17
0.36×73-63×0.36
×
+
÷3[(
-
)÷
]×
.解:(1)1740-1632÷16×17,=1740-102×17,
=1740-1734,
=6;
(2)0.36×73-63×0.36,
=(73-63)×0.36,
=10×0.36,
=3.6;
(3)
×
+
÷3,=
×
+
×
,=
×(
+
),=
×2,=
;(4)[(
-
)÷
]×
,=[(
-
)×
]×
,=[
×
-
×
]×
,=[
-
]×
,=
×
,=
.分析:(1)先算除法,再算乘法,最后算减法;
(2)运用乘法分配律简算;
(3)先把除法变成乘法,再运用乘法分配律简算;
(4)先把中括号里面的除法变成乘法,再运用乘法分配律简算.
点评:乘法分配律是最常用的简便运算的方法,要熟练掌握,灵活运用.