Answer:
if the number to the right of the billions place is 5 or more round up if lower than 5 round down
<em>1,</em><em><u>5</u></em><em>00,000,000 round up = 2,000,000,000</em>
<em>1,</em><em><u>4</u></em><em>00,000,000 round down = 1,000,000,000</em>