类别 | 足球 | 羽毛球 | 羽毛球拍(个) | 乒乓球拍(个) | 排球 | 篮球 |
钱数(元) | 32 | 2 | 65 | 10 | 28 | 45 |
(2)买3个足球,付给售货员100元钱,应找回多少钱?
(3)买1副羽毛球拍和10个羽毛球,需要多少钱?
(4)请你再提出一个数学问题,并解答.
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