Which of the following is an undefined expression? Do not use a calculator. Select \( 100 \div 0 \) Select \( 0-100 \) Select \( 0 \div 100 \)

Dividing by zero is like trying to jump over a bottomless pit—it's simply impossible! So, when you see \( 100 \div 0 \), you've hit an undefined expression because division by zero doesn’t make sense in mathematics. It leaves us hanging without a meaningful answer! On the other hand, both \( 0 - 100 \) and \( 0 \div 100 \) are perfectly fine! In fact, \( 0 - 100 \) equals -100, and \( 0 \div 100 \) equals 0. So, just remember: division by zero is a mathematical no-go!