'three ones' is not correct and usable in written English.
Instead, you should use the word "three" when referring to a number. For example, "I have three apples."
He pulled out a roll of bills and peeled off three ones, dropping them on the table behind the napkin dispenser.
The C. crassa extract showed cytotoxic effect to Vero cell in all dilutions except the last three ones; cytotoxic effect of C. crassa on Vero exhibits that MIC is 9.765 μg/ml, also the incubation period increases the effect of extract on Vero cell.
LB_(_{Kim}) in line 6 is expanded to calculate on the first three data points and the last three ones of nq and nc.
Ms. Cella's dice skittered on the place mat at the head table and then halted, displaying three ones.
To the long list of troubles plaguing the financial industry, add three big ones — make that Big Three ones.
Although the car wears No. 7, it will also carry a stylized rendition of the SANY "three ones" logo, which signifies, "first class enterprise, first class employees and first class contribution to society".
"That's three one-thousandths," Mr. Blumenthal said.
One one thousand, two one thousand, three one thousand.
Three, one, four, one, five, nine.
("One one-thousand, two one-thousand, three one-thousand. Pause. Begin).
