A shop sells toilet rolls in small packs and big packs. There are 4 toilet rolls in a small pack. There are 9 toilet rolls in a big pack. The shop has s s\,s small packs and b b\,b big packs of toilet roll.
Write an expression for the total number of packs of toilet roll the shop has.
Write an expression for the total number of toilet rolls the shop has.
64 exam-style questions on WJEC GCSE Maths Writing an Expression. Each one has a worked solution and a mark scheme showing where the marks go.