Write a number in each box to make the calculation correct.
9+0000=209 + \boxed{\phantom{0000}} = 209+0000=20
18−0000=918 - \boxed{\phantom{0000}} = 918−0000=9
242 exam-style questions on AQA GCSE Maths Solving One Step Equations. Each one has a worked solution and a mark scheme showing where the marks go.