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Algebra: Substitution into Expressions with Fractions (2)

In this worksheet, students substitute values into expressions with fractions.

'Algebra: Substitution into Expressions with Fractions (2)' worksheet

Key stage:  KS 3

Curriculum topic:   Algebra

Curriculum subtopic:   Substitute Numerical Values for Formulae/Expressions

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

When we substitute a number for a letter, we simply replace the letter with the number.



Work out the value of the following expression when a = 4 and b = 9


3a + 4b
2 3



We substitute a = 4 and b = 9 into the following expression:


3a + 4b
2 3


= 3 x 4 + 4 x 9
2  3


= 12 + 36
2  3


=  6  +  12  =  18

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