直接寫出得數(shù)
2
3
=
2
3
=
4
5
÷
5
4
=
0.6-
3
5
=
1÷3×
1
3
=
5
14
÷
5
14
=
4
5
×2.5=
1
2
×
1
3
÷
1
2
×
1
3
=
分析:分?jǐn)?shù)乘整數(shù),用分?jǐn)?shù)的分子和整數(shù)相乘的積做分子,分母不變;分?jǐn)?shù)乘分?jǐn)?shù),用分子相乘的積做分子,分母相乘的積做分母,能約分的要約分;分?jǐn)?shù)除以一個數(shù)(0除外),等于乘這個數(shù)的倒數(shù);據(jù)此解答即可.
解答:解:
2
3
=4
2
3
=9
4
5
÷
5
4
=
16
25
0.6-
3
5
=0
1÷3×
1
3
=
1
9
5
14
÷
5
14
=1
4
5
×2.5=2
1
2
×
1
3
÷
1
2
×
1
3
=
1
9
點(diǎn)評:此題主要考查分?jǐn)?shù)乘除法的運(yùn)算法則的靈活應(yīng)用.
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