(1)一根绳子长18米,剪去5米,剪去全长的几分之几?算式:
(2)一根绳子长18米,剪去全长的 ,剪去多少米?算式:
(3)一根绳子长18米,剪去全长的,还剩多少米?算式:
(4)一根绳子,剪去全长的,还剩12米,这根绳子长多少米?算式:
(5)一根绳子,剪去全长的,正好剪去了15米,这根绳子长多少米?
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