Whole Numbers 5

Mathematics J.S.S 3 First Term

Theme: Number and Numeration

Sub Theme: Whole Number

WEEK 5

Whole Numbers 5

Performance Objectives

Students should be able to;

1. Simplify Expressions involving Brackets
2. Simplify Expressions involving Fractions

Expressions with fractions

Content

Example

Find one-quarter of the positive difference between 29 and 11.

Required value = ¼ (29 – 11)

                            = ¼(18)

                            =

                            = 4 ½

Example

Divide 40 by the sum of 3 and 5.

Required value =  + 5

                            =

                            = 5

Notice that the dividing line of a fraction acts like a bracket on the expressions above or below the line. For example,

40/3 + 5 = 40/(3 + 5)

Always simplify the expressions above or below…