(1)1×8+1=9
12×8+2=98
123×8+3=987
1234×8+4=9876
12345×8+5=
……
(2)7×9=63
77×99=7623
777×999=776223
7777×9999=
77777×99999=
(3)11×5=55
101×56=5656
1001×567=567567
10001×5678=
100001×56789=
(4)3×3=9
33×33=1089
333×333=110889
3333×3333=
33333×33333=

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

