班级 | 收集塑料瓶的个数(个) |
二(1)班 | 1200 |
二(2)班 | 800 |
二(3)班 | 1500 |
(1)二(2)班和二(3)班共收集了多少个塑料瓶?
(2)二(3)班比二(1)班多收集了多少个塑料瓶?
(3)二(1)班给二(2)班多少个塑料瓶,两个班就会一样多?
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