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There are: 640/9 = 71 with a remainder of 1
Nine of them
79
Eleven.
640 ÷ 8 = 80
6 of them with a remainder of 4
5
The GCF of 9s and 63s^3 is 9s.
10 times
Exactly 6 of them
24 of them with a remainder of 2
There are 640 acres in a section.
640 grams = 22.57ounces.
640 ounces = 40 pounds
640 ÷ 8 = 80.