80×5= 7×40= 600×6= 25÷5= 48÷8=
56÷8= 400×8= 7×10= 300×4= 80×5=
500×4= 9×100= 0×81= 25×4= 20×2=
200×3= 3×200= 500×1= 5×4= 8×10+8=
185-25= 600×8= 72÷8= 40÷5= 16×3=
4×7= 30÷5= 0×54+6= 18÷2+9= 20×6=
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