b) \( 5.2-4: 2+9.8= \)

First, let's break it down! You start with the subtraction: \( 5.2 - 4 = 1.2 \). Next, you handle the addition and division. The expression turns into \( 1.2 : 2 + 9.8 \). Divide \( 1.2 \) by \( 2 \) to get \( 0.6 \). Finally, add: \( 0.6 + 9.8 = 10.4 \). So, the answer is \( 10.4 \)! Fun fact: In many cultures, the number 10 is often associated with completeness or perfection, which might make your answer feel even more satisfying! Plus, you can think of this calculation as a mini adventure where each operation is a step toward discovering your final treasure: the answer.