Topic Content:
- Estimation
Estimation may be defined as a rough or sensible guess of a value or calculation.
It is useful to be able to estimate the following:
1. Lengths
2. Weight (masses)
3. And capacities of any given object.
For example:
a. The length of a pencil is ≈ 16cm
b. The height of a man is ≈ 1.8m
c. A bag of salt is ≈ 1kg
Note: the symbol  ≈  means ‘is approximately equal to’
How to choose appropriate metric units of measurement.
The common metric units and their units:
1. Length \( \scriptsize \rightarrow\) km, m, cm, mm
2. Mass \( \scriptsize \rightarrow\) tonne, kg, g
3. Capacity\( \scriptsize \rightarrow\) l, cl, ml
4. Time \( \scriptsize \rightarrow\) hour, min, seconds
Worked Example 11.1.1:
State the appropriate metric unit you would use to measure the following:
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This was very helpful.
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