1. \( 3.45+2.67= \) 2. \( 12.9+7.3= \) 3. \( 0.78+5.21= \) 4. \( 6+3.14= \)

Did you know that adding decimals is like lining up your friends in a queue? Just like you align the decimal points to ensure everyone's on the same level, which helps in avoiding tricky miscalculations later. It’s a simple yet effective technique that works wonders in keeping your math neat and tidy! When it comes to practical uses, mastering decimal addition comes in handy in everyday scenarios like budgeting or cooking. Those grocery lists and recipe conversions require precise calculations to ensure you get the right amounts—imagine forgetting to add that extra 0.5 cup of sugar! Nothing like a pinch of real-world necessity to spice up your math skills!