3×3.14×2+(3÷2)²×3.14×2
=9.42×2+1.5²×3.14×2
=18.84+2.25×3.14×2
=18.84+19.625×2
=18.84+39.25
=58.09m²
(2)2²×3.14×2×500
=12.56×2×500
=25.12×500
=12560kg
(3)(40÷2)²×3.14×60×3分之1
=400×3.14×60×3分之1
=1256×60×3分之1
=75360×3分之1
=25120cm³
25120cm³=2.512m³
2.512×5=12.56(元)
(4)
5-31.4÷[3.14×(4÷2)]=0(cm)