(1/10)18 – (1/10)20 = ?
1. 99/1020
2. 99/10
3. 0.9
4. none of these
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(1/10) * 18 - (1/10) * 20
= (1/10) (18 - 20)
= (1/10) * (-2)
= -2/10
= -1/5 = -.02
Hence the answer will be none of the above.
You will simply take 1/10 common and that will leave you with 18 and 20.
On subtracting them, you will obtain -2 and then divide it by 10.
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