1.05乘59+1.05乘43-2.1简便计算简便简便!

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1.05乘59+1.05乘43-2.1简便计算简便简便!

1.05乘59+1.05乘43-2.1简便计算简便简便!
1.05乘59+1.05乘43-2.1简便计算
简便简便!

1.05乘59+1.05乘43-2.1简便计算简便简便!
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

1.05乘59+1.05乘43-2.1
=1.05乘(59+43)-2.1
=1.05乘102-2.1
=1.05乘(100+2)-2.1
=1.05乘100+1.05乘2-2.1
=105+2.1-2.1
=105