Descriptor
| Addition | 1 |
| Algorithms | 1 |
| Cognitive Development | 1 |
| Computation | 1 |
| Elementary School Mathematics | 1 |
| Elementary Secondary Education | 1 |
| Instruction | 1 |
| Manipulative Materials | 1 |
| Multiplication | 1 |
| Subtraction | 1 |
Source
| Mathematics Teaching | 1 |
Author
| Morley, Arthur | 1 |
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Education Level
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Location
| Netherlands | 1 |
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Morley, Arthur – Mathematics Teaching, 1978
Described are two methods of calculating developed by the Dutch WISKOBAS Project: addition and subtraction with a loop abacus and multiplication using a grid model. (MP)
Descriptors: Addition, Algorithms, Cognitive Development, Computation
