9801
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99 x 99 = 9801
99 + 99 = 198
99 x 10 - 99 x 9 = 99(1 x 10 - 1 x 9) = 99(10 - 9) = 99(1) =99
The answer is 6.99574217 × 1013
99 plus 99 equal 198.In a nother form (This is in when it is used in math class ECT.)99+99=198.