Descriptor
| Addition | 1 |
| Elementary Education | 1 |
| Elementary School Mathematics | 1 |
| Instruction | 1 |
| Integers | 1 |
| Manipulative Materials | 1 |
| Number Concepts | 1 |
| Number Systems | 1 |
| Subtraction | 1 |
Source
| Mathematics Teaching | 1 |
Author
| Bartolini, Pietro | 1 |
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Bartolini, Pietro – Mathematics Teaching, 1976
An instructional sequence in which number lines and beads are used to illustrate addition and subtraction of directed numbers is described. (SD)
Descriptors: Addition, Elementary Education, Elementary School Mathematics, Instruction
