Developing essential understanding of addition and subtraction for teaching mathematics in prekindergarten-grade 2
What is the relationship between addition and subtraction? How do you know whether an algorithm will always work? Can you explain why order matters in subraction but not in addition, or why it is false to assert that the sum of any two whole numbers is greater than either number? It is organized ar...
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| 格式: | 工具包 |
| 语言: | English |
| 丛编: | Essential Understanding
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