题目内容

直接写出得数．
3
5
+
1
5
=		 1-
4
5
=
5
8
+
3
5
=		 0.08×100=
2
5
+
1
4
=		 0.64÷16= 10-8.88= 0.7÷3.5=
0.8×0.125=
7
9
+
2
9
=
分析：根据分数和小数加减乘除的计算方法进行计算．
解答：解：
3
5
+
1
5
=
4
5
 1-
4
5
=
1
5
5
8
+
3
5
=
49
40
 0.08×100=8
2
5
+
1
4
=
13
20
 0.64÷16=0.04 10-8.88=1.12 0.7÷3.5=0.2
0.8×0.125=0.1
7
9
+
2
9
=1
点评：口算时，注意运算符号和数据，然后再进一步计算．
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5
=
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15
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6
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10
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6
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3-
3
5
=
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6
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5
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10
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1
10
=
（2010?南开区）直接写出得数．
3
5
×10=
3
8
+
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4
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4
=		 1.2×
5
6
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5
6
=
7
9
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3
=		 0.6-
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5
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7
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6
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7
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