think! mathematics. 4A, Workbook / authors, Dr Foong Pui Yee, Brandon Oh, Chang Suo Hui, Lim Li Gek, Pearlyn and Wong Oon Hua ; consultant, Dr Yeap Ban Har.
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"The Singapore mathematics approach."--Cover. Primary 4.
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think! mathematics. 4A, Workbook / authors, Dr Foong Pui Yee, Brandon Oh, Chang Suo Hui, Lim Li Gek, Pearlyn and Wong Oon Hua ; consultant, Dr Yeap Ban Har.