A test for checking arithmetic calculations is called casting out nines. Consider the sum
a.
b.
c. Try the check on the subtraction
d. Try the check on the multiplication
e. Would it make sense to try the check on division? Why or why not?
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Chapter 4 Solutions
A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL