Exact and Approximate Values

Transcript

Exact and Approximate Values When to Use What? Bill payment, marks, number of students → Use Exact News reports, population, rough distance → Use Approximate Think… You invite exactly 7 people to your birthday party. You tell your friend, “About 10 people are coming.” Both are valid, but you’re using one to be accurate and the other to be easier to say. Let’s look at some more examples Here, even though she knew the exact time, she told the approximate time But, what exactly are exact and approximate numbers? Exact Numbers These are precise, counted, or measured values. They are totally accurate. Examples: 5 apples → You can count them exactly. ₹1200 → The bill says exactly ₹1200. 100 students in a class → Counted exactly. 463 + 682 = 1,145 → You calculated it. Approximate Numbers These are rounded values — used when we want a quick idea instead of the full exact number. We use them when: Exact numbers aren’t needed It’s easier to communicate in round numbers Examples of Approximate Numbers Examples: ₹732 ≈ About ₹750 1,24,42,373 people in Mumbai ≈ About 1.25 crore people 76,068 population ≈ About 75,000 Comparison of Exact and Approximate Numbers