1.05乘59+1.05乘43-2.1简便计算
问题描述:
1.05乘59+1.05乘43-2.1简便计算
简便简便!
答
1.05乘59+1.05乘43-2.1
=1.05*(59+43)-2.1
=1.05*102-2.1
=(1+0.05)*102-2.1
=1*102+0.05*102-2.1
=102+5.1-2.1
=102+(5.1-2.1)
=102+3
=105