To compare the numbers, we can convert each option into a numerical form:
A. Six and four hundred fifty-seven thousandths = 6.457
B. Six and one hundred seventy-nine thousandths = 6.179
C. 6.39 = 6.390 (for easier comparison)
D. 6x1 + 5x1/10 + 2x1/100 = 6 + 0.5 + 0.02 = 6.52
Now we can compare the numerical values:
- A: 6.457
- B: 6.179
- C: 6.390
- D: 6.52
The greatest number is A. Six and four hundred fifty-seven thousandths (6.457).