Mathematics Year 4 – Unit 1 Exercises by Admin Azlin | May 18, 2021 | Bilik Darjah / Tingkatan, Mata Pelajaran, Matematik, PdPr, Pendidikan, Post, Tahun 4, Teacher Intan's Learning RoomMathematics Year 4 Unit 1 Exercises. Let do some addition, substraction and multiplaction exercises.