(1)一家服装厂原计划每天生产500套服装, 25天完成任务,实际只用了20天.实际每天生产多少套服装?
(2)李奶奶家六月份用电45千瓦时,七月份比六月份多用电,李奶奶家这两个月共用电多少千瓦时?
(3)爸爸的平均步长是0.75米,小娟的平均步长是0.5米,从小娟家到街心公园爸爸走了240步,小娟要走多少步?
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