@article{oai:air.repo.nii.ac.jp:00002236,
 author = {佐藤, 学 and SATO, Manabu},
 journal = {秋田大学教育文化学部研究紀要 教育科学},
 month = {Mar},
 note = {We have studied the handling expansively complement the definition of “a+b=u.a and b are natural numbers. a is the complement number of b.b is the complement number of a”.　I have examined “Need as viewed from the system of number calculation”, “Expectations that learning toexpand” and “Specific pattern of decomposition of addend”. The unit numbers are 10 and 20,30,100,1000. Future issues are considered from the aspect of learning and transition state of understanding of children.},
 pages = {1--6},
 title = {数学教育における教材開発の研究II : 小学校算数科における補数の定義の拡張的扱い},
 volume = {69},
 year = {2014}
}