3.72*49+37.2*5.1+49*51=?简便计算!
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:2024/07/29 14:35:37
3.72*49+37.2*5.1+49*51=?简便计算!
![3.72*49+37.2*5.1+49*51=?简便计算!](/uploads/image/z/815091-51-1.jpg?t=3.72%2A49%2B37.2%2A5.1%2B49%2A51%3D%3F%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%21)
3.72×49+37.2×5.1+49×51
=37.2×﹙4.9+5.1﹚+﹙50-1﹚×﹙50+1﹚
=372+2500-1
=2871.
=37.2×﹙4.9+5.1﹚+﹙50-1﹚×﹙50+1﹚
=372+2500-1
=2871.