(1)如果每串有8只纸鹤,这些纸鹤可以串成多少串?
(2)王华3小时共折了45只纸鹤,照这样的速度,他6小时能折多少只纸鹤?
(3)填空:张丽每小时折26只纸鹤,李梅每小时折18只,王红每小时折24只,杨欣每小时折28只。两个同学一起折2小时,正好折完100只纸鹤,这两个同学是( )和( )。
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