After Martha went grocery shopping she had 4 bottles of juice in the refrigerator and 4 bottles in the pantry. During the week Martha bought 5 more bottles of juice. If Martha and her family drank 3 bottles of juice during the week, how many bottles are left?
Let's think: Martha had 4 bottles of juice in the pantry + 4 bottles in the refrigerator = 8 bottles of juice. After Martha went shopping she added 5 bottles of juice to the + 8 bottles she already had = 13 bottles of juice. Martha and her family drank 3 bottles of juice during the week from the 13 they had, 13 - 3 = 10 bottles left.. The answer is: 10.

Leo has to write a 400-word story for his literature class. 10 words fit on each line of his notebook and 20 lines fit on each page. Lucas has filled one and a half pages. How many words does he have left to write?
Let's think: Half a page is 20 / 2 = 10 lines. In total, he has written 20 + 10 = 30 lines. The 30 lines written are 30 * 10 = 300 words. Lucas has 400 - 300 = 100 words left to write.. The answer is: 100.

John decided to start rowing around a square lake. Each side of the lake is 15 miles. Jake can row at twice the speed he can swim. It takes him 20 minutes to swim 1 mile. How long, in hours, does it take to row the lake?
Let's think: The perimeter of the lake is 4 * 15 = 60 miles. He swims at a speed of 60 / 20 = 3 mph. So he rows at a speed of 3 * 2 = 6 mph. That means it takes him 60 / 6 = 10 hours to row around the lake.. The answer is: 10.

Jeremy listened to five fewer songs yesterday than today. Yesterday, he listened to nine songs. How many songs did Jeremy listen to in two days?
Let's think:
Jeremy listened to 9 + 5 = 14 songs today. Thus, he listened to 9 + 14 = 23 songs in two days.. The answer is: 23.