简便计算 :1. 102X58-116 2.11X203-3 3.125+4X95

Question

要用递等式计算

Answer 1

1. 102X58-116 =102*58-2*58=（102-2）*58=100*58=5800
2.11X203-3 =11*（200+3）-3=11*200+11*3-3=2200+33-3=2230
3.125+4X95=125+4*（100-5）=125+400-20=505本回答被提问者采纳

Answer 2

搜一下：简便计算
:1.
102X58-116
2.11X203-3
3.125+4X95