(1)9×9-1=(________)
98×9-2=(________)
987×9-3=(________)
9876×9-4=(________)
98765×9-5=(________)
987654×9-6=(________)
(2)(98-2)÷8=(________)
(987-3)÷8=(________)
(9876-4)÷8=(________)
(98765-5)÷8=(________))
(987654-6)÷8=(________)
(9876543-7)÷8=(________)
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