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| 57÷1.9= | 2.5×0.4= | 6.3÷9= | 7.6+0.6= |
| 10.5﹣5= | 200×0.5= | 4÷80= | 0.45÷0.3= |
| 4﹣0.9= | 3.7+6.4= | 0÷3.7= | 12.5×80= |
| 180×6= | 42×5= | 8.97+1.03= | 120﹣25×4= |
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
