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1) 1 : 2 = ?
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2) 10 : 20 = ?
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3) 15 : 45 = ?
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4) 6 : 3 = ?
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5) 3 : 1 = ?
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6) 100 : 25 = ?
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7) 4 : 1 = ?
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8) 1 : 5 = ?
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9) 3 : 4 = ?
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10) 1.5 : 4 = ?
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11) 2.5 : 3.5 = ?
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12) 2.25 : 8 = ?
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