True, 20 minutes × 3 = 60 minutes., 1 hour 15 minutes × 2 = 2 hours 30 minutes., 3 minutes 10 seconds × 3 = 9 minutes 30 seconds., 3 days × 2 = 6 days., 8 minutes 40 seconds ÷ 4 = 2 minutes 10 seconds., False, 0 minutes 15 seconds × 2 = 20 minutes 15 seconds., 1 hour 15 minutes × 2 = 2 hours 15 minutes., 4 minutes 20 seconds ÷ 2 = 2 minutes 20 seconds., 2 hours 30 minutes ÷ 5 = 50 minutes., 45 minutes × 4 = 2 hours.

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