商品名称 | 单价(元) |
自动笔 | 3 |
港币 | 15 |
圆珠笔 | 4 |
书包 | 45 |
(1)用100元钱可以买几支自动笔?
(2)一个练习本比一支圆珠笔便宜2元,100元钱能否买50个练习本?
(3)一个书包的价钱是一个铅笔盒价钱的3倍,买25个铅笔盒需要多少元?
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