17-9= 28-8= 20+40= 83-7=
36+5= 47+4= 75-60= 14-5=
8+73= 84-80= 48+0= 97-6=
85-15= 70-9= 25+30= 66+3=
6+7+8= 54-6-8= 35+5-20= 39-9+24=
3元2角+5角=( )元( )角 9角-3角=( )角
7角+8角=( )元( )角 5元9角-9角=( )元
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