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0.8×0.9= 1.2÷3= 0.15÷0.05= 7.8÷6=
2.2×0.3= 2.8÷4= 7.58×10= 0.6×1.6=
5.56×100= 0.96÷8= 0.92 = 0.38÷0.1=
0.13×6= 1.6÷0.4= 0.02×0.2= 2.8×0.2=
0.022 = 3.9÷3.9= 8.4÷4.2= 1.2×0.3=
8×0.05= 0.28÷0.14 = 3.8÷3.8= 0.64÷8=
（2.1+0.4）×0.4 = 3×0.2÷0.3=
（0.8+0.2）÷0.5= 8×0.7÷0.7=
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
