(1)零下3℃比0℃还要低3℃,可用-3℃表示;零下5℃比 0℃还要低5℃,可用 -5℃表示;零下10℃比 0℃还要低10℃,可用
(2)-2℃读作:零下2摄氏度或负2摄氏度;-1℃读作:
(3)-7℃读作:
(4)想一想,比一比,填上“>”“<”或“=”.
-8℃
8℃
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