7.32-(3.8+1.32)
0.6×24+
×76
×
÷(
)[7+(3-1
)]×
+
.解:(1)7.32-(3.8+1.32),=7.32-3.8-1.32,
=(7.32-1.32)-3.8,
=6-3.8,
=2.2;
(2)0.6×24+
×76,=0.6×24+0.6×76,
=(24+76)×0.6,
=100×0.6,
=60;
(3)
×
÷(
),=
÷
,=
×
,=
;(4)[7+(3-1
)]×
+
,=[7+
]×
+
,=
×
+3
,=4
+3
,=(4+3)+(
+
),=7+
,=7
.分析:(1)去括号,运用加法交换律与结合律简算;
(2)把分数化为小数,运用乘法分配律简算;
(3)先算
×
和括号内的,再算括号外的除法;(4)先算小括号内的,再算中括号内的,然后算括号外的乘法,最后算加法.
点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.