Q1
What does estimation mean?
AFinding an approximate value
BFinding an exact value always
CIgnoring numbers
DNothing useful
ICSEClass 6 (ICSE)MathematicsCh 2 · Topic 1
Estimation
Estimation means finding an approximate value or answer, useful when an exact number isn't needed or when checking if an answer seems reason
Core concept
We estimate by rounding numbers to the nearest ten, hundred, or another convenient value, making calculations quicker and simpler.
How it works
For example, estimating 48 + 31 might mean rounding to 50 + 30 = 80, giving us a quick approximate answer.
Why it matters
Estimation is useful for quickly checking if an exact calculated answer seems reasonable or if there might be an error.
Key detail
We use estimation in daily life, like guessing the total cost of groceries or estimating travel time.
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• Estimation finds an approximate value.
• We estimate by rounding numbers.
• Rounding to nearest ten or hundred is common.
• 48+31 rounds to 50+30=80.
• Estimation helps check if answers are reasonable.
• It can catch calculation errors.
• We use estimation in daily life.
• Examples: grocery costs, travel time.