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4.38+6.62= 10﹣0.01= 7.4﹣2.93﹣3.07= 1.25×3.2=
6.4÷0.25= 1﹣
﹣
﹣
= 6.5÷12.5= 2
+
=
+0.85= 
+0.25= 1.4+
= 1
+0.4+2
=1
= 4.1﹣2
= 5
﹣3.49+1
= 25﹣（3
+2
）=
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
