1/10^20 - 1/10^21 ??

SAT math problem and i have no idea how to solve it.

2007-10-17 18:38:05 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

1/10^20 - 1/10^21

Take out the factor 1/10^20 :

= 1/10^20(1 - 1/10)

= 1/10^20(9/10)

= 9/10^21

2007-10-17 18:45:25 · answer #1 · answered by falzoon 7 · 2⤊ 1⤋

(10 - 1) / 10^(21) = 9 / 10^(21)

2007-10-18 12:22:23 · answer #2 · answered by Como 7 · 0⤊ 0⤋

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