Question
If $\text{A}=(12.0\pm0.1)\text{cm}$ and $\text{B}=(8.5\pm0.5)\text{cm},$ find:
- $\text{A}+\text{B}$
- $\text{A}-\text{B}$
✓
Answer
- $\text{A}+\text{B}=20.5\pm0.6\text{cm}$
- $\text{A}-\text{B}=3.5\pm0.6\text{cm}$
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