4Rubenstein R N. Computational Estimation and Related Mathematical Skills [J]. Journal for Research in Mathematics Education, 1985, 16(2): 106-119.
5LeFevre J, Greenham S L, Waheed N. The Development of Procedural and Conceptual Knowledge in Computational Estimation [J]. Cognition and Instruction, 1993, 11(2): 95-132.
6Mottram R D. A Comparative Study of Computational Estimation Ability and Strategies Used in Estimation Problems [J]. DAI-A, 1996, 57(2): 614.
7Lemaire P, Lecacheur M, Farioli E Children's Strategy Use in Computational Estimation [J]. Canadian Journal of Experimental Psychology, 2000, 54 (2): 141-148.
8Dowker A D, Barlow C W. The Role of Cues to Differential Absolute Size in Children's Transitive Inferences [J]. Journal of Experimental Child Psychology, 2002, 81 (3): 249-275.
9Case R, Sowder J T. The Development of Computational Estimation: A Neo-piagetian Analysis [J]. Cognition and Instruction, 1990, 7(2): 79-104.
10Siegler R S, Stem E. Conscious and Unconscious Strategy Discoveries: A Micro-genetic Analysis [J]. Journal of Experimental Psychology: General, 1998, 27(4): 73-97.