3
1
4
+2
1
3
-4
5
6
=
3
4
3
4
分析:3
1
4
+2
1
3
-4
5
6
改寫(xiě)成(3+2-4)+(
1
4
+
1
3
-
5
6
),進(jìn)而計(jì)算得解.
解答:解:3
1
4
+2
1
3
-4
5
6
,
=(3+2-4)+(
1
4
+
1
3
-
5
6
),
=1-
3
12
,
=
3
4
點(diǎn)評(píng):此題考查異分母分?jǐn)?shù)加減法計(jì)算方法的運(yùn)用,解決此題也可以把帶分?jǐn)?shù)先化成假分?jǐn)?shù),再通分成同分母分母,進(jìn)而計(jì)算得解.
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