口算.
3
4
-
1
4
=
3
4
÷
1
4
=
3
8
+0.625
=
3+
3
4
=
0.6+
2
5
=
10+
1
10
=
分析:利用分?jǐn)?shù)加減法計算法則和除法法則計算即可;注意(3)(5)把小數(shù)化為分?jǐn)?shù)計算.
解答:
解:
3
4
-
1
4
=
1
2

3
4
÷
1
4
=3

3
8
+0.625
=1
3+
3
4
=3
3
4
0.6+
2
5
=1
10+
1
10
=10
1
10
點評:此題考查分?jǐn)?shù)四則運算的計算方法,注意計算結(jié)果的化簡.
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