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0.5×0.8= 3×0.7= 1.1+0.9= 3.6×0.4=
12.5×8= 50×0.04= 1﹣0.45= 2.5×0.4=
80×0.3= 0.25×7×4= 1.2÷0.2= 2.5×4=
0.25+4= 1.87×0= 3.5+0.5= 1.2÷0.4=
0÷1.25= 0.4÷8= 5÷10= 15÷0.01=
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
