60×6= 25×4= 6×15= 64÷2=
150×6= 12×50= 220÷2= 31×20=
60×80= 30×12= 2×39= 810÷90=
7×80= 60÷30= 450÷5= 400÷8=
490÷7= 15×30= 8×300= 66÷3=
91-37= 630÷70= 703+88= 80÷20=
475-245= 22×40= 480÷60= 7200÷800=
9×31= 480÷40=
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