71+6= 8+51= 39-8= 4+26= 64-40=
5+52= 46+3= 52+7= 23+8= 85-4=
76-50-20= 66-4-8= 63-8-2= 54+8+2= 35+9+1=
3×4= 54÷6= 9×6= 20÷5= 8×5=
7÷7= 1×9= 18÷3= 35+5= 2×8=
1元-3角= 36元-12元= 1元3角-9角=
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