Being STUCK
To concisely describe my response to this reading, here are two "stops" (moments of reflection or insight) I encountered:
- Recognition of being STUCK as a learning opportunity: The text highlights the importance of acknowledging and embracing the state of being stuck, transforming it into a productive process rather than a source of frustration. This reframing stood out as a mindset shift essential for tackling challenging problems.
- Using systematic strategies to get unstuck: The suggestion to return to the Entry phase (identifying what is KNOWN, WANTED, and what can be INTRODUCED) provided a structured approach to navigating mental blocks, emphasizing the power of organization and reflection in problem-solving.
These points resonated as they underline growth through persistence and structure in mathematical thinking.
Two-Column Solution for the "Weighing Fish" Puzzle
Puzzle:
A fisherman caught three fish. The fish were not weighed separately, but in pairs.
- The big fish and the medium-sized fish together weigh 16 kg.
- The big fish and the small fish together weigh 14 kg.
- The medium-sized fish and the small fish together weigh 12 kg.
Question: How much does each fish weigh?
Mathematical Work | Process, Emotional Reactions, Dead Ends, and Productive Approaches… |
Step 1: Define variables | At first, I felt a bit overwhelmed by the amount of information, but I decided to stay organized. |
Let B be the weight of the big fish, M be the weight of the medium-sized fish, and S be the weight of the small fish. | I decided to use simple letters for the fish weights to make the math easier to follow. |
From the puzzle, we have three equations: | I read the problem carefully several times to make sure I understood the relationships between the fish weights. |
1. B+M=16B + M = 16 | This equation was simple and clear. I felt confident about it. |
2. B+S=14B + S = 14 | The second equation followed a similar pattern, which reassured me. |
3. M+S=12M + S = 12 | The third equation gave me hope that I had enough information to solve for all three fish weights. |
Step 2: Solve the system of equations | I thought about how to combine these three equations to find the individual weights. |
Add all three equations together: | I felt optimistic that combining them would simplify the system. |
(B+M)+(B+S)+(M+S)=16+14+12(B + M) + (B + S) + (M + S) = 16 + 14 + 12 | I realized I could combine the equations by grouping similar terms. |
2B+2M+2S=422B + 2M + 2S = 42 | I was happy to see a pattern, as I noticed a common factor (2) in all the terms. |
Divide by 2: | This step felt logical and straightforward. |
B+M+S=21B + M + S = 21 | I now had a total weight for the three fish combined, which felt like progress. |
Step 3: Solve for individual fish weights | I felt that I was close to finding the individual weights. |
Subtract equation 1 from this new equation: | I decided to subtract to eliminate B+MB + M and focus on SS. |
(B+M+S)−(B+M)=21−16(B + M + S) - (B + M) = 21 - 16 | I double-checked my subtraction to avoid mistakes. |
S=5S = 5 | I felt happy to have found the first fish's weight — a small victory! |
Subtract equation 2 from the new equation: | I repeated the same strategy, feeling more confident this time. |
(B+M+S)−(B+S)=21−14(B + M + S) - (B + S) = 21 - 14 | This approach seemed to work well, so I continued. |
M=7M = 7 | I felt satisfied because I now had the weight of the medium fish as well. |
Subtract equation 3 from the new equation: | I felt excited, knowing I was close to finding the final weight. |
(B+M+S)−(M+S)=21−12(B + M + S) - (M + S) = 21 - 12 | I followed the same process, hoping it would work again. |
B=9B = 9 | I was thrilled to find the weight of the big fish. All the pieces had fallen into place. |
Step 4: Verify the solution | I wanted to make sure my answers were correct. |
Check the three original equations: | I felt that verifying my work was important to avoid mistakes. |
1. B+M=9+7=16B + M = 9 + 7 = 16 ✅ | Perfect! The first equation works. I felt reassured. |
2. B+S=9+5=14B + S = 9 + 5 = 14 ✅ | Great! The second equation is also correct. |
3. M+S=7+5=12M + S = 7 + 5 = 12 ✅ | Yes! The third equation is correct too. I felt accomplished. |
Conclusion | I felt happy and satisfied that I had solved the puzzle using a logical, step-by-step approach. |
The weights of the fish are: | I reviewed the entire process to ensure I didn't make any mistakes. |
Big fish = 9 kg, Medium fish = 7 kg, Small fish = 5 kg | I felt proud of my work and the clarity of my process. |