1. 99x26的簡便運算
99X26=(100-1)X26=100X26-1X26=2600-26=2574
2. 99×26簡便運算
99×26 =(100-1)×26 =100×26-1×26 =2600-26 =2574
3. 99×26,怎簡別技算l
解:運用分配律的簡便方法 原式=(100-1)x26=100x26-1x26=2600-26=2574
4. 99x26怎樣用簡便演算法算