0.23乘以3/5乘以(-1)的3次方减19乘以三分之二减三分之一乘以19乘以(-1)的四次方减0.23乘以二分之五
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解:
0.23×3/5×(-1)^3 - 19×2/3 -1/3×19×(-1)^4 - 0.23×2/5
=[0.23×3/5×(-1)^3 - 0.23×2/5]- [19×2/3 +1/3×19×(-1)^4]
=( -0.23×3/5 - 0.23×2/5) - (19×2/3 +1/3×19)
= -0.23×(3/5+2/5) - 19×(2/3+1/3)
= -0.23×1 -19
= -0.23 -19
= -19.23
0.23×3/5×(-1)^3 - 19×2/3 -1/3×19×(-1)^4 - 0.23×2/5
=[0.23×3/5×(-1)^3 - 0.23×2/5]- [19×2/3 +1/3×19×(-1)^4]
=( -0.23×3/5 - 0.23×2/5) - (19×2/3 +1/3×19)
= -0.23×(3/5+2/5) - 19×(2/3+1/3)
= -0.23×1 -19
= -0.23 -19
= -19.23
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