作业帮64×79+35×79+39递等式计算等于多少
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/11 19:56:36
64×79+35×79+39递等式计算等于多少
64×79+35×79+39递等式计算等于多少
64×79+35×79+39递等式计算等于多少
64×79+35×79+79
=(64+35+1)×79
=100×79
=7900
估计题目中的79错打成39了.
64×79+35×79+39
=64×79+35×79+79-40
=79X（64+35+1）-40
=79X100-40
=7900-40
=7860
64×79+35×79+39
=64×79+35×79+79-40
=(64+35+1)×79-40
=100×79-40
=7900-40
=7860