①291÷3 ②372÷4 ③3+4 ④ 291+372 ⑤ 663 ⑥ 7 ⑦93
⑧ 97 ⑨663>7 ⑩93<97 ⑪答:小林跳得快。⑫答:小花跳得快。
1.列式正确的是( )
A.①② | B.②④ | C.③④ |
A.⑤⑥ | B.⑦⑧ |
A.⑨ | B.⑩ |
A.⑪ | B.⑫ |
A.①②⑦⑧⑩⑫ | B.③④⑤⑥⑨⑪ | C.①②⑦⑧⑩⑪ |
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