
四分之十三加括号里负五分之十三加四分之二十三减五分之四十二等于多少?
2个回答
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13/4+(-13/5+23/4-42/5)
=13/4+(-13/5-42/5+23/4)
=13/4+(-55/5+23/4)
=13/4+(-11+23/4)
=13/4-21/4
=-8/4
=-2
=13/4+(-13/5-42/5+23/4)
=13/4+(-55/5+23/4)
=13/4+(-11+23/4)
=13/4-21/4
=-8/4
=-2
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