Translating Expressions

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```					Translating Expressions

I. Learning Objectives

Cognitive:        Translate expressions such as ½ of 2/3, 2/3 of 1/6 to mathematical sentences
Psychomotor:      Illustrate expressions using shaded regions
Affective:        Show resourcefulness in doing one's project

II. Learning Content

Skills:           1. Translating expressions such as ½ of 2/3, 2/3 of 1/6
2. Multiplying a fraction by another fraction
References:       BEC-PELC II E 1.2.1 & E 2
Materials:        flash cards, cutouts of fractions, learning activity sheet, chart showing
illustrations
Value:            Resourcefulness

III. Learning Experiences

A. Preparatory Activities

1. Drill
Contest on basic multiplication facts using flash cards.

2. Review
Naming fractions
Give the fraction for the shaded part.

3. Motivation
Get ½ sheet of Grade 4 paper. Fold ½ of your paper. What is ½ of a half? What word in
this sentence has an equivalent symbol in mathematics? What symbol car] be replaced by
the word "of"?

B. Developmental Activities

1. Presentation

Nancy found a piece of white cloth in an old chest of her grandmother. She cut 2/3 of
it, then she used ½ of this for her apron's pockets. What part of the whole piece of cloth
did Nancy use for her apron's pockets?

a. Help the pupils in the analysis of data.

1. What kind of a girl is Nancy?
2. If you were Nancy, would you do the same? Why?
3. What part of the cloth did Nancy cut?
4. What part of the cloth did Nancy use for the apron's pockets?
5. Write the mathematical sentence.

b. Help them visualize and interpret the multiplication sentence.

1. Show them this illustration.

c. Present the multiplication sentence from the expression.

d. Present another example.

2. Group Activity

a. Write the mathematical sentence for the following expressions.

b. Translate the following expressions to mathematical sentences then find the product.

c. Illustrate the following expressions using shaded regions and translate into mathematical.

3. Generalization

How do you translate expressions such as ½ of 2/3 into mathematical sentence?
To translate expressions like ½ of 2/3 into mathematical sentence, we change "of" to
"x" symbol which means 'times' to form the multiplication sentence.

C. Application

During a tooth-brushing demonstration for dental week, several Grade 4 pupils used ½ of
the ¾ full tube of toothpaste. What part of the whole tube of toothpaste was used?

IV. Evaluation

1. Translate the following expressions to multiplication sentences.

2. Complete the data in the chart.

3. Name the double-shaded region by writing two fractions using the word "of" then translate them
into a multiplication sentence.

V. Assignment

Translate the following expressions to multiplication sentence.

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