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Answer/Step-by-step explanation:
[1] is 20 9/11 closer to 20 or 21? Answer: 21
[2] is 18 3/10 closer to 18 or 19? Answer: 18
[3] is 10 3/7 closer to 10 or 11? Answer: 10
[4] is 22 2/9 closer to 22 or 23? Answer: 22