Two ninths.
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One and one ninth.
It is 0.012345679 with the underlined string repeating.
-1/9 x 1/9 = -1/81
Two thousand million Two billion Two times ten to the ninth (2 × 109) (The British and the Americans disagree about what is a billion and a trillion etc.) No one disputes that 2 000 000 000 is "Two times ten to the ninth" Scientific notation is good too: 2,0 E9
0.5