14x99+14 85x201-85 175-57-43+25 45x102简便运算

分类: 作业答案 • 2022-01-09 18:03:09

问题描述：

答

14x99+14
=14x(99+1)
=14x100
=1400
85x201-85
=85x(201-1)
=85x200
=17000
175-57-43+25
=175+25-(57+43)
=200-100
=100
45x102
=45x(100-2)
=4500-90
=4410