Step 1: At the supermarket, I round numbers as I keep track of how much I'm spending to stay on budget. I mentally add up the sum of my purchases to the nearest dollar. Regarding time, I regularly say, "I'm leaving in about 5 minutes" or "dinner will be done in around 10 minutes." When leaving for an appointment, I round up to account for parking and unknown delays, so my appt that is 17 minutes away will be about 20 minutes in my mind. I always round for time estimates.
Step 2: My family reported similar rounding, except when it comes to exercise like running because seconds count!
Step 3: My family and I regularly use rounding when estimating time. We do this without realizing it as we go about our daily activities. We round our expected food purchases as we shop at the supermarket. My parents regularly announce that we are leaving for an event in 10 minutes, when the reality is that it could be 8-12 minutes. We estimate the time it takes to get to activities and appointments, always rounding to a 5 minute interval. We also round for estimated food delivery times when we update each other by saying,"Food should be delivered in 20 minutes." The runners in my family do not round when tracking their times as seconds matter for their personal records.