Sure! Here are the filled-in sentences:
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25 is a whole number and would be a terminating decimal.
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−0.07 is a rational number and would be a terminating decimal.
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49 is a whole number and would be a terminating decimal.
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√99 is a irrational number and would be a non-terminating, non-repeating decimal.
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−0.03521... is a rational number and would be a non-terminating, repeating decimal.
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√121 is a whole number and would be a terminating decimal.