奇妙的数字世界，让你感受数学之美
1 x 8 + 1= 9
12 x 8 + 2= 98
123 x 8 + 3= 987
1234 x 8 + 4= 9876
12345 x 8 + 5= 98765
123456 x 8 + 6= 987654
1234567 x 8 + 7= 9876543
12345678 x 8 + 8= 98765432
123456789 x 8 + 9= 987654321
0 x 9 +1= 1
1 x 9 +2= 11
12 x 9 +3= 111
123 x 9 +4= 1111
1234 x 9+ 5= 11111
12345 x 9+ 6= 111111
123456 x9 + 7= 1111111
1234567 x9 + 8= 11111111
12345678x 9 + 9= 111111111
123456789
x 9 +10= 1111111111
9 x 9 + 7= 88
98 x 9 + 6=888
987 x 9 + 5= 8888
9876 x 9 + 4=88888
98765 x 9 +3= 888888
987654 x 9 +2= 8888888
9876543 x 9 +1= 88888888
98765432 x 9+ 0= 888888888
1 x 1= 1
11 x 11= 121
111 x 111=12321
1111 x 1111=1234321
11111 x11111= 123454321
111111 x111111= 12345654321
1111111 x1111111= 1234567654321
11111111 x11111111= 123456787654321
111111111 x 111111111= 12345678987654321