Estimation

Mathematics for Jss1 2nd Term.

Theme: Basic Operations.

Week 1 and 2.

Estimation

Performance Objectives.

Students should be able to

1. Estimate the dimensional distance within the school.

2. Estimate the mass and capacity of given objects.

3. Estimate other things in day to day activities.

4. Solve problems on quantitative reasoning on estimation.

 Content.

Estimation is a rough guess or calculation of the value, size or amount of an object or item. Since estimation is usually done without actual calculation, an estimated value will only give an idea of the actual value.

In estimation of length and area

10mm=1cm

10cm=1 dm(decimeter)

10dm=1m

1000m=1km.

The common units of length (i.e km,m,cm,mm) ,mass (i.e tonne,kg,g), capacity(i.e, l,cl,ml) and time(hr,min,sec).

Example 1: To measure the distance between Lagos and Benin-city we use km.

Example 2: To measure the height of a man we use metres and centimetres.

Week 2.

ACTIVITY.

Example1: Measure the distance between your seat to the board. What will you use?

Answer: metre rule or pace.

Example 2:what is used to measure the amount of kerosene in a Jerrican.

Answer: litre.