52*65+36*25-25如何简便运算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 14:15:35
![52*65+36*25-25如何简便运算](/uploads/image/z/181900-28-0.jpg?t=52%2A65%2B36%2A25-25%E5%A6%82%E4%BD%95%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
52*65+36*25-25如何简便运算
52*65+36*25-25如何简便运算
52*65+36*25-25如何简便运算
52*65+36*25-25
=52*65+35*25
=13^2*20+3500/4
=169*20+875
=3380+875
=4255
25*65+36*25-25
=25*(65+36-1)
=25*100
=2500
52*65+36*25-25
=52×65+35×25
=52×65+﹙100-65﹚×25
=52×65+2500-65×25
=65×﹙52-25﹚+2500
=65×27+2500
=65×﹙30-3﹚+2500
=65×30-65×3+2500
=1950-195+2500
=4255