AlgebraKey Stage 3

Words into expressions

Write an algebraic expression from a description in words.

  • Use letters for unknown values.
  • Translate the operations carefully and keep their order.
  • Use brackets when a whole sum or difference is multiplied.
In wordsExpression
five more than
three less than
double
three times the sum of and 4
half of

Example 1

Write an expression for “7 more than twice ”.

Twice

Example 2

Write an expression for “subtract 6 from , then divide by 3”.

Subtract 6 first

Your turn

Question 1

Write an expression for “7 less than ”.

Check answer

Start with , then subtract 7.

Question 2

Write an expression for “6 more than double ”.

Check answer

Double , then add 6.

Question 3

Write an expression for “three times the sum of and 5”.

Check answer

The whole sum goes in brackets.

Question 4

Write an expression for “a quarter of ”.

Check answer

Divide by 4.

Question 5

Write an expression for “10 minus the square of ”.

Check answer

Square , then subtract it from 10.