4 1/2 - 9 = -4 1/2 (negative four and a half)
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1 half of 9 is not 4. It is 4.5.
Half 9 and 1/4 is 4 and 5/8.
39 / 9 = 4 + 1/3 So 9 can be subtracted from 39 4 times.
-9
9. Each 4 has 2 halves (2x4=8) plus the 1 half. Arithmetically, 4 1/2 = 9/2 9/2 divided by 1/2 = 9