38元 45元 29元 27元
(1)买一架玩具飞机和一辆玩具汽车,一共用多少元?
( )
(2)一艘玩具轮船比一架玩具飞机贵多少元?
( )
(3)我买了一辆玩具自行车,找回了23元,我付了多少元?
( )
(4)小明带了80元钱,买一辆玩具汽车和一艘玩具轮船,够吗?
( )
够 不够
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