ambridge International Primary and Lower Secondary Curriculum Frameworks. Whether they are adding and subtracting three-digit numbers or ordering and comparing fractions, Cambridge Primary Mathematics helps your learners develop their mathematical thinking skills.They'll be fully supported with worked examples and plenty of practice exercises, while projects throughout the book provide opportunities for deeper investigation of mathematical concepts - including investigating modelling of prisms and pyramids. With key word boxes, clear diagrams and supporting illustrations, the course makes maths accessible for second language learners.