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| Addition | 1 |
| Algorithms | 1 |
| Elementary Education | 1 |
| Elementary School Mathematics | 1 |
| Instructional Materials | 1 |
| Mathematical Applications | 1 |
| Mathematics Instruction | 1 |
| Subtraction | 1 |
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| Friedlander, Richard J. | 1 |
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| Journal Articles | 1 |
| Reports - Descriptive | 1 |
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Peer reviewedFriedlander, Richard J. – School Science and Mathematics, 1981
This report illustrates a simple, short, yet relatively little known partial check on addition that elementary school pupils can be lead to discover, and later taught to understand. The process can also be used for subtraction and is viewed as more useful than the traditional check of casting out nines. (MP)
Descriptors: Addition, Algorithms, Elementary Education, Elementary School Mathematics
