用简便方法计算178-89+223-111


用简便方法计算178-89+223-111
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解答 :
178-89+223-111
=(178+223)-(89+111)
=400-200
=200
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178-89+223-111
=(178+223)-(89+111)
=(唯旁178+222+1)指烂橡历搭-200
=400+1-200
=201
简便方法计算
78-89+223-111
=(178+223)-(89+111)
=401-200
=201
178-89+223-111=
178+223-(89+111)=178+223-200=178+23=201
178-89+223-111
=(178+223)-(89+111)
=400-200
=200