3又1/3×(-0.3)×(-1又1/4)×(-2又1/3) 负因数有三个,积为负
=-(10/3×3/10×5/4×7/3)
=-(1×5/4×7/3)
=-35/12
-3/4×(4/9-2又2/3+12)
=-3/4×4/9-3/4×(-2又2/3)-3/4 ×12
=-1/3 +3/4×8/3 -9
=-1/3 +2 -9
=-22/3
3又1/3×(-0.3)×(-1又1/4)×(-2又1/3) 负因数有三个,积为负
=-(10/3×3/10×5/4×7/3)
=-(1×5/4×7/3)
=-35/12
-3/4×(4/9-2又2/3+12)
=-3/4×4/9-3/4×(-2又2/3)-3/4 ×12
=-1/3 +3/4×8/3 -9
=-1/3 +2 -9
=-22/3