10. Explain how to find the sum of \( \frac{9}{100}+\frac{7}{10} \).

To find the sum of \( \frac{9}{100}+\frac{7}{10} \), first, you need a common denominator. Since \( 10 \) can be expressed as \( \frac{10}{100} \), you can rewrite \( \frac{7}{10} \) as \( \frac{70}{100} \). Now you have \( \frac{9}{100} + \frac{70}{100} = \frac{79}{100} \). So, the sum is \( \frac{79}{100} \) or \( 0.79 \) in decimal form! One trick to remember is that when adding fractions, always look for that common denominator first! It's a key step to making things easier and preventing mistakes. A common pitfall is skipping this step and trying to add fractions with different denominators directly—trust me, your future self will thank you for taking the time to find that common ground!