157.5
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Half of 630 is 315. To find half of a number, you simply divide the number by 2. In this case, 630 divided by 2 equals 315. This division is based on the concept of dividing a whole into two equal parts, resulting in each part being half of the original amount.
315 degree
320
"If the units digit and the hundreds digit of the number 513 were reversed..." 315 'find the sum of the original number and the new number." 513+315=828
52.5