英里与公里

利用近似关系（5英里≈8公里）在英里和公里之间进行换算。

Convert between miles and kilometres using the approximate relationship (5 miles ≈ 8 km)

学习证据 / Evidence

• 将40英里换算成大约64公里。
• 解释为什么英里与公里之间的换算系数约为1.6。
• 利用英里与公里之间的关系，比较一场10公里赛跑和一次6英里跑步。

• Convert 40 miles to approximately 64 km
• Explain why the conversion factor between miles and km is approximately 1.6
• Use the miles↔km relationship to compare a 10 km race with a 6-mile run

评估问题 / Assessment

如果{{name}}开车40英里去主题公园，他们能用“5英里≈8公里”的规则估算出大约是多少公里吗？

If {{name}} is driving 40 miles to a theme park, can they use the rule that 5 miles ≈ 8 km to estimate roughly how many kilometres that is?