简便计算:28×3.5+2.8×75-28
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 04:18:37
![简便计算:28×3.5+2.8×75-28](/uploads/image/z/130949-53-9.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A28%C3%973.5%2B2.8%C3%9775-28)
简便计算:28×3.5+2.8×75-28
简便计算:28×3.5+2.8×75-28
简便计算:28×3.5+2.8×75-28
28x3.5+2.8x75-28
=28x(3.5+7.5-1) 注:2.8x75=28x7.5
=28x10
=280
28x3.5+2.8x75-28=28x3.5+28x7.5-28=28x(3.5+7.5-1)=28x10=280