A.一个长方形的长是dm,宽是dm,面积是多少平方分米? |
B.鲜鲜水果店新进了一批水果,第一天卖出了它的,第二天卖出了第一天的,第二天卖出了这批水果的几分之几? |
C.淘气和笑笑一起折100只千纸鹤,淘气折了它的,笑笑折了它的,两人一共折了千纸鹤的几分之几? |
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