题目内容
| 计算: | 12÷( | ||
| 27×(3- | |||
解:(1)
÷
×
=
×
×10,
=
;
(2)
×
×
=
;
(3)12÷(
×
)
=12×
,
=
;
(4)
÷3×
=
×
×
,
=
;
(5)
÷(1÷
)
=
×
,
=
;
(6)
÷
×
=
×
×
,
=
;
(7)
+4×
=
+
,
=4;
(8)27×(3-
)
=27×3-27×
,
=51-12,
=39;
(9)
÷
-
=
-
,
=
;
(10)
×
×
=
×
×
,
=
×
,
=
;
(11)
×26+
×26
=(
+
)×26,
=1×26,
=26;
(12)
×
+
÷
=
+
,
=
.
分析:(1)(4)(6)(10)可根据乘法交换律计算;
(2)(3)(5)(7)(9)(12)根据四则混合运算的运算顺序计算即可;
(8)(11)根据乘法分配律计算即可.
点评:完成本细心分析式中数据,注意通分约分.
=
=
(2)
(3)12÷(
=12×
=
(4)
=
=
(5)
=
=
(6)
=
=
(7)
=
=4;
(8)27×(3-
=27×3-27×
=51-12,
=39;
(9)
=
=
(10)
=
=
=
(11)
=(
=1×26,
=26;
(12)
=
=
分析:(1)(4)(6)(10)可根据乘法交换律计算;
(2)(3)(5)(7)(9)(12)根据四则混合运算的运算顺序计算即可;
(8)(11)根据乘法分配律计算即可.
点评:完成本细心分析式中数据,注意通分约分.
练习册系列答案
相关题目