2) \( 3+2,25-1-0,13 \)

Let’s break it down together! First, you can add \(3 + 2.25\), which equals \(5.25\). Then, subtract \(1\) from that, giving you \(4.25\). Finally, subtract \(0.13\) to get \(4.12\). Easy-peasy, right? So the answer is \(4.12\)! Did you know that decimal operations are essential for everyday activities? Whether it's managing your budget, calculating discounts while shopping, or measuring ingredients for a recipe, decimal arithmetic makes life easier. So next time you crunch some numbers, remember how handy they can be!