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You don't. Don't be silly. A tenth of a teaspoon is a pinch (a pinch of salt, etc), or a few drops of fluid.
I'd be suspicious of any recipe giving such instructions.
Very rarely, recipes require very accurate measurements, for example in the molecular cuisine. Those should give the required quantities in volume or weight (ml, mg, etc). Those that do not should stick with more common descriptions such as "a pinch" or "a few drops."
What else can I help you with?
How do you write one eighth of a teaspoon in decimal form?
One eighth is written " 0.125 ".The word or unit after it tells what it's one-eighth of .
How do you write 4100 as decimal form?
That IS the decimal form.
How do you write 28.65 in decimal form?
It is in decimal form!
How do you write 5.32 in decimal form?
That IS the decimal form.
How do you write 9.305 in decimal form?
That is in decimal form.
How do you write fourteen and three tenths in decimal form decimal form?
You write fourteen and three tenths in decimal form as: 14.3
How do you write 0.09 in decimal form?
0.09 IS in decimal form.
How do you write 8.85 in a decimal form?
It is already in decimal form.
How do you write 125.49 in decimal form?
It is already in decimal form.
How do you write 7.32 in decimal form?
7.32 It is in decimal form.
How do you write 137 in decimal form?
137 is in decimal form.
How do you write 2.4 in decimal form?
2.4 is in decimal form.
