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ERIC Number: EJ194979
Record Type: Journal
Publication Date: 1978-Nov
Pages: N/A
Abstractor: N/A
ISBN: N/A
ISSN: N/A
EISSN: N/A
Understanding the Check of Nines.
Johnson, Phillip E.
Arithmetic Teacher, v26 n3 p54-55 Nov 1978
A discussion of the check of nines for the four arithmetic operations is given along with an explanation of why it works. (MP)
Descriptors: Computation, Elementary Education, Elementary School Mathematics, Instruction, Mathematics, Teacher Education
Publication Type: N/A
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A