7.8乘以6.9 +2.6乘以79.3用简便方法怎么计算
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/18 11:36:14
7.8乘以6.9 +2.6乘以79.3用简便方法怎么计算
![7.8乘以6.9 +2.6乘以79.3用简便方法怎么计算](/uploads/image/z/3541316-68-6.jpg?t=7.8%E4%B9%98%E4%BB%A56.9+%2B2.6%E4%B9%98%E4%BB%A579.3%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E6%80%8E%E4%B9%88%E8%AE%A1%E7%AE%97)
7.8*6.9+2.6*79.3
=2.6*3*6.9+2.6*79.3
=2.6*20.7+2.6+79.3
=2.6*(20.7+79.3)
=2.6*100
=260
=2.6*3*6.9+2.6*79.3
=2.6*20.7+2.6+79.3
=2.6*(20.7+79.3)
=2.6*100
=260