如题所述
第1个回答 2020-10-22
-2又1/7-(-4又3/5)+(-3又5/7)-(1又3/5)
=-2又1/7+4又3/5-3又5/7-1又3/5
=-2又1/7-3又5/7+(4又3/5-1又3/5)
=-5又6/7+3
=-2又6/7
等于负的2又6/7
=-2又1/7+4又3/5-3又5/7-1又3/5
=-2又1/7-3又5/7+(4又3/5-1又3/5)
=-5又6/7+3
=-2又6/7
等于负的2又6/7
第2个回答 2020-10-22
(-2又1/7)-(-4又3/5)+(-3又5/7)-(1又3/5)
= (-2又1/7)+(4又3/5)+(-3又5/7)-(1又3/5)
= [ (-2又1/7)+(-3又5/7)] + [(4又3/5)-(1又3/5)]
= (-5又6/7) + 3
= -2又6/7本回答被网友采纳
= (-2又1/7)+(4又3/5)+(-3又5/7)-(1又3/5)
= [ (-2又1/7)+(-3又5/7)] + [(4又3/5)-(1又3/5)]
= (-5又6/7) + 3
= -2又6/7本回答被网友采纳