题目内容

3
14
×4=
4
7
×3=
1
6
×4=
4
35
×7=
7
12
×8=
9
10
×25=
分析：运用分数的乘法的计算法则进行计算，计算的结果要化简成最简分数．
解答：解：
3
14
×4=
6
7


4
7
×3=
12
7
=1
5
7


1
6
×4=
2
3


4
35
×7=
4
5


7
12
×8=4
2
3


9
10
×25=22
1
2
．
点评：本题运用乘法的计算法则进行计算，要先约分再进行计算．
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4
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3
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1
8
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2
5
=
5
6
×18=
4
5
÷8=
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=		 0.25+
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=
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2
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4
=
5
14
÷
4
21
×
16
25
=
2
7
÷
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21
=
3
14
×
7
8
=		 8-4÷
4
7
=
5
6
-
1
2
=
7
18
÷14=		 12×（
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3
-
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6
）=		 5%×5=
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5
+
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7
+
4
5
+
3
7
=
3.75+
5
8
=		 63%-27%= （1-20%）÷20%= 0.4÷
2
5
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9
×1.8=
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9
×25%=
直接写得数
4
5
-
1
2
=
1
2
+
3
4
=
7
10
×
5
7
=		 2-
3
5
=
3
22
×11=
3
14
×
7
8
=		 0×
2
13
=
2
3
÷
2
3
=
5
8
÷
1
8
=		 4÷
4
7
=
4
9
×
3
8
=
7
12
×
3
14
=
直接写得数
4
5
-
1
2
=
1
2
+
3
4
=
7
10
×
5
7
=		 2-
3
5
=
3
22
×11=
3
14
×
7
8
=		 0×
2
13
=
2
3
÷
2
3
=
5
8
÷
1
8
=		 4÷
4
7
=
4
9
×
3
8
=
7
12
×
3
14
=
直接写得数
4
5
-
1
2
=
1
2
+
3
4
=
7
10
×
5
7
=		 2-
3
5
=
3
22
×11=
3
14
×
7
8
=		 0×
2
13
=
2
3
÷
2
3
=
5
8
÷
1
8
=		 4÷
4
7
=
4
9
×
3
8
=
7
12
×
3
14
=

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