Write a number in each box to make the calculation correct.
20−7=000020 - 7 = \boxed{\phantom{0000}}20−7=0000
0000=8+9\boxed{\phantom{0000}} = 8 + 90000=8+9
242 exam-style questions on OCR GCSE Maths Solving One Step Equations. Each one has a worked solution and a mark scheme showing where the marks go.