题目内容
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分析:先把
分解成
+
,或者
+
=
,再根据分数乘整数的意义以及计算法则求解.
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解答:解:
+
+
=
+
+
+
=
×4
=1;
或者:
+
+
=
+
+
=
+
=
×2
=1;
所以:
+
+
=
×4=
×2=1.
故答案为:4,×2,1.
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| 4 |
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=
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=
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=1;
或者:
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| 4 |
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=
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=
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=
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=1;
所以:
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| 4 |
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| 2 |
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故答案为:4,×2,1.
点评:本题通过变化变成相同的加数,再根据分数乘整数的意义求解.
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