⑴100千克稻谷可碾米75千克,1千克稻谷可碾米多少千克?
⑵1千克黄豆可出油0.38千克,100千克黄豆可出油多少千克?1000千克黄豆呢?
⑶张老师用43.20元买了10支钢笔,每支钢笔多少元?买100支这样的钢笔应付多少元?
⑷甲数是3.8,乙数是38,在它们的末尾都添上两个零,这时乙数是甲数的多少倍?
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