54+45+63+72+81这道题目怎么用简便方法做?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/21 03:35:11
![54+45+63+72+81这道题目怎么用简便方法做?](/uploads/image/z/363680-8-0.jpg?t=54%2B45%2B63%2B72%2B81%E8%BF%99%E9%81%93%E9%A2%98%E7%9B%AE%E6%80%8E%E4%B9%88%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E5%81%9A%3F)
x)35616367Ҷ0|/x>{ݳ';;OY|]Ó}Mlԧmҧ_`gC@M@0}`![ӁFnm",@P.6жTx?ig_.lN%˟y:{M!LcCS<;~܌
54+45+63+72+81这道题目怎么用简便方法做?
54+45+63+72+81这道题目怎么用简便方法做?
54+45+63+72+81这道题目怎么用简便方法做?
45+54+63+72+81
=9×5+6×9+7×9+8×9+9×9
=9×(5+6+7+8+9) 提取每项最大公因数9
=9×35
=315