Miss Kashef here — let's learn how to make smart guesses!
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Estimation Strategies
Hello my clever Grade 3 friends! Today Miss Kashef will teach you how to make smart guesses (estimates) before measuring or calculating exactly. Estimation helps us think fast and check our answers!
What is Estimation?
Estimation is making a good guess that is close to the real answer.
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We estimate before we measure or calculate exactly.
Estimating Length
Your desk is about 1 metre long
A pencil is about 15 cm long
The classroom is about 8 metres wide
Estimating Quantity
About 30 students in our class
About 20 books on the shelf
About 50 seeds in one orange
Estimating Mass
Your school bag is about 3 kg
An apple is about 150 grams
A bag of rice is about 5 kg
Estimating Capacity
A water bottle holds about 500 mL
A big jug holds about 2 litres
A small cup holds about 250 mL
Why We Estimate
To check if our exact answer makes sense
When we don't have time to measure exactly
To make quick decisions
To understand big numbers better
Practice Estimation
Estimate how many pages in your math book
Estimate how heavy your backpack is
You Are Doing Amazing!
You can now make reasonable estimates for length, quantity, mass, and capacity!
Estimation is a very useful life skill!
Well Done, My Estimation Experts! 🌟
You have completed the full lesson on Estimation Strategies.
Use estimation every day — it makes you a smarter thinker!