Write a number in each box to make the calculation correct.
7+0000=197 + \boxed{\phantom{0000}} = 197+0000=19
23−0000=823 - \boxed{\phantom{0000}} = 823−0000=8
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.