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15
=[-3+(-5+4)]×(-3/2)]×2/3÷(-27/8)
=[-3+(-1)×(-3/2)]×2/3×(-8/27)
=(-3+3/2)×2/3×(-8/27)
=-3/2×2/3×(-8/27)
=8/27
16
=-1-0.5×1/3×(2-9)
=-1.5×1/3×(-7)
=-0.5×(-7)
=3.5
=[-3+(-5+4)]×(-3/2)]×2/3÷(-27/8)
=[-3+(-1)×(-3/2)]×2/3×(-8/27)
=(-3+3/2)×2/3×(-8/27)
=-3/2×2/3×(-8/27)
=8/27
16
=-1-0.5×1/3×(2-9)
=-1.5×1/3×(-7)
=-0.5×(-7)
=3.5
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