用竖式计算，带☆的要验算．356÷26= ☆903÷21= ☆555÷37．
把下面的假分数化成带分数或整数．=====
先约分，再化成整数或带分数．=====
把下面每组中的两个数化成分母相同的假分数．和1 5和，和2．
把下面的假分数化成整数或带分数．======
把下列假分数化成带分数或整数，把带分数化成假分数．========
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和1 5和
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和2．
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