Question

0.23乘5分之3乘（-1）的3次方-19乘3分之2-3分之1乘19乘（-1）的四次方-0.23乘5分之2

Answer 1

^表示乘方

原式=0.23×(3/5)×(-1)³-19×2/3-(1/3)×19×(-1)^4-0.23×2/5

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

=(-0.23)×3/5-19×2/3-19×1/3-0.23×2/5

=(-0.23)×(3/5+2/5)-19×(2/3+1/3)

=(-0.23)×1-19×1

=-0.23-19

=-(0.23+19)

= -19.23