学进去-教育应平等而普惠
试题
类型:口算和估算
难度系数:0.65
所属科目:小学数学
口算
12÷6=                              12÷2=                                     12÷4=
9÷9=                                 6÷3=                                        10÷2=
12÷3=                              9÷3=                                      6÷6=
24÷6=                                30÷5=                                     16÷4=
3×4=                                5×5=                                      6×6=
24÷4=                              25÷5=                                     36÷6=
3×2=                              2×5=                                      3×4=
6÷2=                            14÷2=                                   24÷3=
24÷8=                            10÷5=                                   24÷6=
5×3=                              5×6=                                     6×4=
15÷3=                            30÷6=                                   24÷4=
15÷5=                           30÷5=                                   24÷6=
7×8=                              8×9=                                     7×9=
56÷7=                            72÷8=                                   63÷7=
56÷8=                           72÷9=                                   63÷9=
6×7=                              9×6=                                     6×5=
42÷6=                            54÷6=                                   30÷5=
42÷7=                           54÷9=                                   30÷6=
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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

用户名称
2019-09-19

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

用户名称
2019-09-19
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