(1)22×20= (2)360÷9= (3)12×40= (4)0÷7= (5)5.6-3.2=
(6)3.2-0.4= (7)10×70= (8)55÷5= (9)2.3+1.7= (10)63÷3=
(11)30×13= (12)804÷4= (13)216÷3= (14)1-0.6= (15)5×18=
(16)3.5+2.6= (17)409÷8≈ (18)88×32≈ (19)4+4.1= (20)150÷5=
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