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Question
You can also play it. Here are the cards for you. Work out the combination. Place the cards in the right boxes.
| 30 | 42 | 12 | 30 | 42 | 12 | |||||
| + | = | - | = | |||||||
| + | = | - | = |
Solution
| 30 | 42 | 12 | 30 | 42 | 12 | |||||
| 30 | + | 12 | = | 42 | , | 42 | - | 12 | = | 30 |
| 12 | + | 30 | = | 42 | 42 | - | 30 | = | 12 |
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