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解:4.25点括号3.6减0.82括号
=4.25*(3.6-0.82)
=4.25*(2.6+1-0.82)
=4.25*(2.6+0.18)
=4.25*2.78
=(4+0.25)(3-0.22)
=12-0.88+0.75-0.055
=12.75-0.935
=11.75+1-0.935
=11.75+0.065
=11.815
=4.25*(3.6-0.82)
=4.25*(2.6+1-0.82)
=4.25*(2.6+0.18)
=4.25*2.78
=(4+0.25)(3-0.22)
=12-0.88+0.75-0.055
=12.75-0.935
=11.75+1-0.935
=11.75+0.065
=11.815
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