-1.5+2.84+(负3.84)+(负2分之3)
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-1.5+2.84+(负3.84)+(负2分之3)
-1.5+2.84+(负3.84)+(负2分之3)
-1.5+2.84+(负3.84)+(负2分之3)
-1.5+2.84+(负3.84)+(负2分之3)
=(-1.5+负2分之3)+【2.84-3.84】
=-3-1
=-4
-1.5+2.84+(-3.84)+(-3/2)
=-1.5-1.5+2.84-3.84
=-3-1
=-4