2. \( 0.15+0.36= \)

When you add \( 0.15 \) and \( 0.36 \), you align the decimal points to ensure accurate addition. Adding these two together gives you \( 0.51 \). Just think of it as stacking your coins: 15 cents plus 36 cents nicely makes 51 cents! To double-check your work, you can also add it in another way. Convert the decimals to fractions: \( \frac{15}{100} + \frac{36}{100} = \frac{51}{100} \). Then, converting back to decimal gives you the same answer of \( 0.51 \). It's all about making sure you stay in line!