Primary mathematics. 1B. Workbook. Part two / Primary Mathematics Project Team, Dr Koh Tek Hong, project director ; team members, Chee Kum Hoong, Hector ; Liang Hin Hoon ; Lim Eng Tann ; Lim Hui Cheng, Rosalind ; Ng Hwee Wan ; Ng Siew Lee.
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Primary mathematics. 1B. Workbook. Part two / Primary Mathematics Project Team, Dr Koh Tek Hong, project director ; team members, Chee Kum Hoong, Hector ; Liang Hin Hoon ; Lim Eng Tann ; Lim Hui Cheng, Rosalind ; Ng Hwee Wan ; Ng Siew Lee.