더 연습
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| ▭\:\longdivision{▭} | \times \twostack{▭}{▭} | + \twostack{▭}{▭} | - \twostack{▭}{▭} | \left( | \right) | \times | \square\frac{\square}{\square} |
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| - \twostack{▭}{▭} | \lt | 7 | 8 | 9 | \div | AC |
| + \twostack{▭}{▭} | \gt | 4 | 5 | 6 | \times | \square\frac{\square}{\square} |
| \times \twostack{▭}{▭} | \left( | 1 | 2 | 3 | - | x |
| ▭\:\longdivision{▭} | \right) | . | 0 | = | + | y |
step-by-step
Dan%5C%3Ais%5C%3Atwice%5C%3Aas%5C%3Aold%5C%3Aas%5C%3ABob.%5C%3AThe%5C%3Asum%5C%3Aof%5C%3Atheir%5C%3Aages%5C%3Aseven%5C%3Ayears%5C%3Aago%5C%3Awas%5C%3A13.%5C%3AHow%5C%3Aold%5C%3Aare%5C%3Athey%5C%3Anow%3F
ko
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