题目内容
+= | = | = |
= | = | = |
解:+=, | =, | =, |
=, | =, | =. |
分析:+先通分,再相减;,,,约分求解;,根据除以一个数等于乘这个数的倒数求解.
点评:本题考查了基本的分数运算,计算时要细心,注意把结合化成最简分数.
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直接写出得数.
+= | -= | ÷= | = |
×= | 1÷= | 55×= | 8×+8×= |
题目内容
+= | = | = |
= | = | = |
解:+=, | =, | =, |
=, | =, | =. |
+= | -= | ÷= | = |
×= | 1÷= | 55×= | 8×+8×= |