Answer:
The boat harvested 59 more lobsters on day 1 than on day 4.
To find out how many more lobsters the boat harvested on day 1 than on day 4, we can subtract the number of lobsters harvested on day 4 from the number harvested on day 1:
176 - 117 = 59
So, the boat harvested 59 more lobsters on day 1 than on day 4.
To estimate and check the reasonability of the answer, we can round the numbers and perform a quick mental calculation. In this case, we can round 176 to 180 and 117 to 120. Then, estimate the difference:
180 - 120 = 60
Since the estimated difference is close to the calculated difference of 59, it gives us confidence that the answer is reasonable. The boat harvested approximately 60 more lobsters on day 1 than on day 4.