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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.
| 50 | 70 | 20 | 50 | 20 | 70 | |||||
| + | = | , | - | = | ||||||
| + | = | - | = |
Numerical
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Solution
| 50 | 70 | 20 | 50 | 20 | 70 | |||||
| 50 | + | 20 | = | 70 | , | 70 | - | 50 | = | 20 |
| 20 | + | 50 | = | 70 | 70 | - | 20 | = | 50 |
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