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1.2×0.3= 0.7×0.5=
0.21×0.8= 1.8×0.5=
1.3+0.74= 1.25×8=
1﹣0.82= 0.25×0.4=
1÷0.05= 0.89×1=
0.11×0.6= 80×0.05=
0÷4.2= 0.24÷0.2=
2.1﹣0.05= 5.6÷7=
9.8﹣8.9= 4.3+6.7=
2.5×7×0.4= 0.77×99+0.77=
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
