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Java Games: Flashcards, matching, concentration, and word search. |
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Subtraction as Think-Addition
Use a think-addition model for subtraction (e.g., "What goes with this part to make the total?" For example, for 9 - 4, think "Four and what makes nine?"
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| A | B |
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| 1 - 0 | 0 + 1 |
| 2 - 0 | 0 + 2 |
| 5 - 0 | 0 + 5 |
| 7 - 0 (Fact with Zero) | 0 + 7 |
| 8 - 0 | 0 + 8 |
| 7 - 6 | 1 + 6 |
| 7 - 7 (Fact with Zero) | 0 + 7 |
| 8 - 1 (One-less Than) | 1 + 7 |
| 8 - 2 (Two-less Than) | 2 + 6 |
| 8 - 3 (Ten-frame Fact) | 3 + 5 |
| 8 - 5 (Ten-frame Fact) | 3 + 5 |
| 9 - 9 (Double) | 0 + 9 |
| 9 - 4 (Near Double) | 4 + 5 |
| 10 - 7 (Ten-frame Fact) | 7 + 3 |
| 13 - 5 | 5 + 8 |
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