来自李朝旭的问题
化简a-2a+3a-4a+5a-6a…+99a-100a
化简a-2a+3a-4a+5a-6a…+99a-100a
1回答
2020-03-26 11:33
化简a-2a+3a-4a+5a-6a…+99a-100a
化简a-2a+3a-4a+5a-6a…+99a-100a
a-2a+3a-4a+5a-6a…+99a-100a
=(a-2a)+(3a-4a)+(5a-6a)…+(99a-100a)
=-a-a-a……-a
=-50a