Solving simple linear equations with an additive step

12 questions

1. Which equations are represented by this bar model?
2. Which equations are represented by this bar model?
3. Match each value with its additive inverse.
4. Which of these are zero pairs?
5. What is the value of the expression 2(3x + 5) when x = −3 ?
6. The diagram shows a balanced scale on the left. When an operation is performed to the RHS, it is not balanced. What operation must be performed to the LHS to maintain equality?
7. What is the value of the unknown in this bar model? x=___
8. Which best describes the mistake that has been made when solving the equation below?
9. The solution to the equation x − 5 = 15 is when x = ___
10. Which of these shows the correct working to solve the equation x + 3.8 = 2.3 in one additive step?
11. The solution to the equation x + 7.2 = 14.6 is when x = ___
12. Which of these is the solution to the equation x − {2\over 3} = {5\over 6} ?

License: OGL