(1)一桶油,连桶重46千克,倒出油的后,连桶还重11千克.桶重多少千克?
(2)一种电视机打六折出售后,售价1200元,这种电视机降价多少元?
(3)甲乙两人合做一批零件,20天可以完成.甲乙两人工作效率的比是5:4.甲独做这批零件需要多少天才能完成?
(4)一桶煤油重15千克,一桶汽油比这桶煤油少20%,这桶汽油比煤油少多少千克?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2