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| 80×5=________ | 96÷3=________ | 25×4=________ | 120÷3=________ | 540÷6=________ |
| 52﹣18=________ | 60×4=________ | 0÷100=________ | 87+6=________ | 560÷8=________ |
| 32×4=________ | 8×500=________ |  ﹣  =________ |  +  =________ |  +  =________ |
 -________=  | 97×8≈________ | 708÷7≈________ | 596×4≈________ | 598÷3≈________ |
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
