SS1 First Term Mathematics Lesson Note – Logarithms II

The content is just an excerpt from the complete note for SS1 First Term Mathematics Lesson Note – Logarithms II. Check below to download the complete DOCUMENT

WEEK 3

TOPIC: LOGARITHMS

CONTENT:

Use Of Logarithm Table And Antilogarithm Table In Calculation Involving

1. Multiplication
2. Division

• Powers

1. Roots
2. Application of logarithm in capital market and other real-life problems

Logarithm and antilogarithm tables are used to perform some arithmetic basic operations namely: multiplication and division. Also, we use logarithm in calculations involving powers and roots.

The basic principles of calculation using logarithm depends strictly on the laws on indices. Recall that.

• Log MN = Log M + Log N
• Log = Log M – Log N

Hence, we conclude that in logarithm;

1. When numbers are multiplied, we add their logarithms
2. When two numbers are dividing, we subtract their logarithms.

 

• Multiplication of numbers using logarithm tables

Example 1

Evaluate 92.63 x 2.914

Solution

Number	Standard form	Log	operation
92.63	9.263 x 101	1.9667
2.914	2.914 x 100	0.4645	add
		2.4312

Antilog of 2.4312 =269.9

Example 2

Evaluate 34.83 x 5.427

Solution

Number	Standard form	Log	operation
34.83	3.483 x 101	1.5420
5.427	5.427 x 100	0.7346	add
		2.2766

Antilog of log 2.2766 = 189.1

Class Activity:

Evaluate the following

1. 26 x 23.83
2. 1 x 3.932
3. 31 x 22.45 x 19.64

To gain full access to the note: DOWNLOAD FILE