15.5×6.7+3.3×15.5可以写成15.5×(6.7+3.3)，闭磨闷即：15.5×6.7+3.3×15.5 = 15.5×(6.7+3.3) = 15.5×10 = 155因游镇此，15.5×6.7+3.3×15.5等轿弯于155
15.5×6.7+3.3×15.5递等式计算？
Simone
发布于 2023-04-30 06:40:37
623 阅读
Simone
发布于 2023-04-30 06:40:37
623 阅读
