计算: ÷ ×![]() | × ×![]() | 12÷( × ) | ÷3×![]() |
÷(1÷ ) | ÷ ×![]() | +4×![]() | 27×(3- ) |
÷ -![]() | × ×![]() | ×26+ ×26 | × + ÷ . |
÷
×
=
×
×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.