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Question
Do it mentally and write the answers.
| 2 × 6 = ______ | 4 × 80 = ______ |
| 20 × 6 = ______ | 4 × 81 = ______ |
| 2 × 60 = ______ | 9 × 25 = ______ |
| 3 × 42 = ______ | 31 × 9 = ______ |
Solution
| 2 × 6 = 12 | 4 × 80 = 320 |
| 20 × 6 = 120 | 4 × 81 = 324 |
| 2 × 60 = 120 | 9 × 25 = 225 |
| 3 × 42 = 126 | 31 × 9 = 279 |
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