1)(33221-332.21)÷(66442-664.42)
=(33221-332.21)÷[(33221-332.21)×2]
=1÷2
=0.5
(2)(2002002+200.2002)÷(8008008+800.8008)
=(2002002+200.2002)÷[(2002002+200.2002)×4]
=1÷4
=0.25
(3) (1234+123.4-12.34)-(2468+246.8-24.68)
=(1234+123.4-12.34)-[(1234+123.4-12.34)×2]
=1÷2
=0.5
希望对你有帮助