0.23乘以5分之3乘以負一的3次方减去19乘以負一的4次方减0.23乘以5分之2的簡便方法

0.23乘以5分之3乘以負一的3次方减去19乘以負一的4次方减0.23乘以5分之2的簡便方法

0.23×3/5×(-1)3-19×(-1)4-0.23×2/5
=-0.23×(3/5+2/5)-19
=-0.23-19
=-19.23

用簡便方法計算負3分之2的2005次方乘以1.5的2005次方

負3分之2的2005次方乘以1.5的2005次方
=(-2/3×1.5)^2005
=(-1)^2005
=-1