60 - 18 = 42
Eighteen minus a negative 3 is twenty-one (21).
30%
Eighteen and sixty five thousandths.
Sixty-eight and eighteen thousandths.
Negative sixty-four minus four squared is equal to -80.
Eighteen sixty three was marred by the American Civil War. Eighteen sixty three is found in the first half of that decade.
Eighteen.
Thirteen(13)
5
18 (eighteen)
17
2,460,009,018