0.8元=80分 0.16元=16分 80÷16=5 | 0.8÷0.16 =(0.8×100)÷(0.16×100) =8÷16 =0.5 | |
明明 | 天天 | |
因为0.16+0.16+0.16+0.16+0.16=0.8, 所以0.8÷0.16=5。 | ||
笑笑 | 乐乐 |
A.只有明明 | B.只有笑笑 | C.天天和笑笑 | D.明明和乐乐 |
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