45.19-(21.821+30.19)+42.81简便计算方法?
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根据题意,计算如下
原式=45.19-30.19-21.821+42.821
=15+21
=36
原式=45.19-30.19-21.821+42.821
=15+21
=36
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45.19-(21.821+30.19)+42.81
=45.19-21.821-30.19+42.81
=(45.19-30.19)+42.81-21.821
=15+42.81-21.821
=57.81-21.821
=35.989
=45.19-21.821-30.19+42.81
=(45.19-30.19)+42.81-21.821
=15+42.81-21.821
=57.81-21.821
=35.989
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解:原式=(45.19+42.81)-(21.821+30.19)
=88-52.011
=35.989
=88-52.011
=35.989
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2020-07-28 · 知道合伙人教育行家
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45.19-(21.821+30.19)+42.81
= (45.19+42.81)-(21.81+0.011+30.19)
= (45.19+42.81) - (21.81+30.19) -0.011
= 88 - 52 - 0.011
= 36 - 0.011
= 35.989
= (45.19+42.81)-(21.81+0.011+30.19)
= (45.19+42.81) - (21.81+30.19) -0.011
= 88 - 52 - 0.011
= 36 - 0.011
= 35.989
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