60×9=_____ | 600+38=_____ | 36÷4=______ | 90+420=_____ | 325+475=___ |
98-15=____ | 72÷8=_______ | 45÷9=______ | 16×7=______ | 0+15=______ |
150×0=____ | 92-9=______ | 320-207=___ | 129+350=___ | 200-170=___ |
400×5=____ | 900-750=___ | 7×700=____ | 3×222=_____ | 5×9+6=____ |
22×6 ≈____ | 302×9≈_____ | 298×3≈____ | 29×8≈_____ | 508-397≈____ |
____ | _____ | ____ | _____ | _____ |
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