For a fundraiser, Nellie needs to sell 45 rolls of gift wrap. So far, she has sold 1 roll to her grandmother, 10 rolls to her uncle, and 6 rolls to a neighbor. How many more rolls of gift wrap does Nellie need to sell?
Let's think: The number of rolls already sold is 1 + 10 + 6 = 17. Nellie needs to sell 45 − 17 = 28 more rolls of gift wrap.. The answer is: 28.

Jame gets 20 singing lessons. He gets the first lesson free and after the first 10 paid lessons he only needs to pay for every other lesson. Each lesson is $5. His uncle pays for half. How much does James pay?
Let's think: The first lesson is free. The lessons 2 to 11 cost 10 * $5 = $50. He then had 9 remaining lessons where he had to pay for every other one. So he pays for lessons 13,15,17&19 = 4 lessons. Those lessons cost 4 * $5 = $20. So in total, the cost was $50 + $20 = $70. So he paid $70 / 2 = $35.. The answer is: 35.

Mandy has three $20 bills while Manny has two $50 bills. If both of them decide to exchange their bills for $10 bills, how many more $10 bills than Mandy will Manny have?
Let's think: Mandy has a total of $20 x 3 = $60. So, she will have $60 / $10 = 6 $10 bills. Manny has a total of $50 x 2 = $100. So, he will have $100 / $10 = 10 $10 bills. Hence, Manny has 10 - 6 = 4 more $10 bills than Mandy.. The answer is: 4.

A group of 6 students organized a fundraiser to go to Nicaragua for the summer. For them to go on the trip, each of them needs at least $450. On top of that, they need $3000 for their miscellaneous collective expenses. On the first day of their fundraiser, they receive $600. On the second day, they receive $900, and on the third day, they receive $400. For the next 4 days, they receive only half of what they raised on the first 3 days. How much more money does each person need to raise for them to reach their goal?
Let's think:
All together, they need to raise ($450 x 6) + $3000 = $5700. The raised $600 + $900 + $400 = $1900 the first 3 days. For the next 4 days, they only raised $1900 / 2 = $950. In the week, they raised $1900 + $950 = $2850. They still need $5700 - $2850 = $2850. Each person still needs $2850 / 6 = $475.. The answer is: 475.