A.妈妈去广场散步,每分钟走50米,4分钟走一圈,走了2圈,一共走了多少米? |
B.文具店一天卖出4包笔记本,每包50本,每本2元。一共卖了多少元? |
C.王叔叔在一个长50米的游泳池内游了4个来回,他一共游了多少米? |
D.小青买了2支笔,一支4元,一支50元,一共花了多少元? |
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