设.(这个就不用说了吧)
360=(24×5)x
360=120x
x=360÷120
x=3
(2)(0.7-0.2)×0.8×1.2
=1.2×0.8×0.5
=0.48(立方米)
(3)(40-2×5)×(30-2×5)×5
=30×20×5
=600×5
=3000(立方厘米)
=0.003(立方厘米)
设.(这个就不用说了吧)
360=(24×5)x
360=120x
x=360÷120
x=3
(2)(0.7-0.2)×0.8×1.2
=1.2×0.8×0.5
=0.48(立方米)
(3)(40-2×5)×(30-2×5)×5
=30×20×5
=600×5
=3000(立方厘米)
=0.003(立方厘米)