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  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
987654321 x 9 - 1 =  8888888888
9876543210 x 9 - 2 =  88888888888