2.5×1.37+0.25×26.3简便计算2.89×1.23+2.89×0.77-2.89的简便运算!

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/06 23:09:29
2.5×1.37+0.25×26.3简便计算2.89×1.23+2.89×0.77-2.89的简便运算!

2.5×1.37+0.25×26.3简便计算2.89×1.23+2.89×0.77-2.89的简便运算!
2.5×1.37+0.25×26.3简便计算
2.89×1.23+2.89×0.77-2.89的简便运算!

2.5×1.37+0.25×26.3简便计算2.89×1.23+2.89×0.77-2.89的简便运算!
原式=2.89×(1.23+0.77)-2.89 【乘法分配律】
=2.89×2-2.89
相减得2.89×1.
=2.89

做任务~~
路过

2.89*(1.23+0.77-1)=2.89

2.5×1.37+0.25×26.3
=0.25×10×1.37+0.25×26.3
=0.25×(10×1.37+26.3)
=0.25×(13.7+26.3)
=0.25*40
=10