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Algebra: Using Letters to Form Algebraic Expressions | Grade 4 Math

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GRADE 4 MATHEMATICS REVISION QUESTIONS

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Algebra

Using Letters to Form Algebraic Expressions

We use letters in the alphabet to form algebraic expressions. These letters are from a to z.
Everything can be represented in terms of letters.
For instance, we can use:
t to represent tables
b to represent boys
g to represent girls
a to represent books

Forming Algebraic Expressions

Practice 1

Using the letters given above, form an algebraic expression to show:
3 boys + 5 girls

Answer

Boys are represented by the letters b and girls by the letters g.
Hence
3 boys = b + b + b = 3b
5 girls = g + g + g + + g + g = 5g
3b + 5g

Question 1

Use different letters to write an algebraic expression to show:
a) 4 books + 6 pens
b) 10 chairs + 2 tables
c) 1 desk + 4 books
Show your answers to your teacher/parent/guardian.

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