An airplane flight from Houston, Texas to Rome, Italy is 5,686 miles. Estimate the distance between the two cities as the product of a single digit number times a power of 10.
One way to estimate the distance between Houston and Rome as the product of a single digit number times a power of 10 is:
5 x 1000 = 5000 miles.
This gives an estimate of 5,000 miles between Houston, Texas and Rome, Italy.