= | = |
= | = |
= | = |
+
)×2,=1-(
+
)×2,=1-
×2,=1-
,=
;(2)
-
×(
+
),=
-
×(
+
),=
-
×
,=
×(1-
),=
×
,=
;(3)
÷(
÷
+
),=
÷(
×
+
),=
÷(
+
),=
÷(
+
),=
÷
,=
×
,=
;(4)(
-
×
)÷
,=(
-
)÷
,=
×6,=4;
(5)
÷[(
-
)×
],=
÷[(
-
)]×
],=
÷[
×
],=
÷
,=
×
,=2;
(6)(
-
)÷(
×
),=(
-
)÷
,=
×
,=
.分析:根据分数的混合运算顺序,按照先算乘除,再算加减,有括号的先算括号里面的顺序计算即可.
点评:本题考查分数的四则混合运算,注意运算顺序,抓住数字特点,能简算的地方要简算.
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=
=
=
=
=