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addition and subtraction within 10
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CN¥ 0.0 | 65392 ben available |
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addition and subtraction within 20
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CN¥ 0.0 | 98543 ben available |
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addition and subtraction within 30
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CN¥ 0.0 | 99201 ben available |
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addition and subtraction within 50
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CN¥ 0.0 | 99217 ben available |
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cobble method
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CN¥ 0.0 | 98078 ben available |
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borrow ten methods
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CN¥ 0.0 | 98127 ben available |
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decomposition and composition
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CN¥ 0.0 | 90031 ben available |
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problem solving
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CN¥ 0.0 | 99211 ben available |
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figure calculation
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CN¥ 0.0 | 99171 ben available |
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time and rmb
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CN¥ 0.0 | 99183 ben available |
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