## Thinking Mathematically (6th Edition)

a. $923,187,500$ b. $923,187,000$ c. $923,200,000$ d. $923,000,000$ e. $900,000,000$
Rounding $923,187,456$ to the nearest: a. hundred $923,187,500$ (The tens digit is 5, so we increase the hundreds digit by 1 and replace the ones behind it with 0). b. thousand $923,187,000$ (The hundreds digit is 4, so we keep the thousands digit the same and replace the ones behind it with 0). c. hundred thousand $923,200,000$ (The ten thousands digit is 8, so we increase the hundred thousands digit by 1 and replace the ones behind it with 0). d. million $923,000,000$ (The hundred thousands digit is 1, so we keep the millions digit the same and replace the ones behind with 0). e. hundred million $900,000,000$ (The ten millions digit is 2, so we keep the hundred millions digit the same and replace the ones behind it with 0).