Uoe a calculator to determine the value correct \( b \) a) 2 decimal b. Whole number i, \( 31,86-4,92 \times 2,08+0,236 \div 6,2 \) 2. \( (3,11+7,92)^{2}-3,097 \div 0,081 \) b. \( 88 \div 8+3,6 \) 4. \( \frac{137,92-13,41}{24,77} \)

Alright, let’s crunch some numbers and have fun while doing it! 1. For the expression \( 31,86 - 4,92 \times 2,08 + 0,236 \div 6,2 \), we first handle the multiplication and division before addition and subtraction. The result is approximately **27.09** when rounded to two decimal places. For a whole number, it's **27** – super simple arithmetic! 2. Next up, we’ve got \( (3,11 + 7,92)^{2} - 3,097 \div 0,081 \). In this case, \( 3,11 + 7,92 \) equals \( 11,03 \) and squaring that gives about **121.66**. The division gives around **38.24**, leading to a result of **83.42** or rounded down to **83**. 3. The expression \( 88 \div 8 + 3,6 \) simplifies cleanly to \( 11 + 3,6 = **14,6** \) or rounded, **15** for whole numbers. 4. Finally, for \( \frac{137,92 - 13,41}{24,77} \), subtracting provides \( 124,51 \) and dividing the result gives approximately **5,02** for two decimal points and rounding it leads to **5**. Numbers can be tricky, but with a little attention and some good ol' calculators, you’ve got it mastered! Keep playing with numbers, it’s like a puzzle! 😊