直接寫出得數(shù).
3
4
÷
3
4
=
1
7
×
3
10
=
18×
1
6
=
1
3
÷3=
3.2-
9
10
=
1
2
+
1
5
=
10÷
1
5
=
6.8×80=
分析:根據(jù)分數(shù)乘法、除法、加法和減法的計算方法進行口算即可.
解答:
解:
3
4
÷
3
4
=1

1
7
×
3
10
=
3
70

18×
1
6
=3
1
3
÷3=9
3.2-
9
10
=2.3
1
2
+
1
5
=
7
10
10÷
1
5
=50
點評:明確分數(shù)乘法、除法、加法和減法的計算方法,是解答此題的關鍵.
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