Broken up into six different sections, this worksheet provides ample practice of substituting positive and negative integers into expressions containing up to two variables.

In section A, students are given a value for a and b (one positive and one negative) and will substitute these into expressions such as 3b. Section B is similar, however, this time, both a and b are assigned negative values.

Sections C and D contain expressions involving addition and subtraction and include numerical terms.

Students will have to consider the correct order of operations to complete sections E and F, where expressions are made up of up to three terms and three operations.