Solve did you use an estimate or an exact answer?

1/people donated 124 books to the library last month and 139 books this month. How many books were donated in this period?

2/The library has 387DVDs in its collection. A total of 154DVDs are currently on loan topatrons. To the nearest hundred, how many DVDs are left in the library?

3/Doug owes 75sc for one overdue library book and s1.10 for another. How much does he owe the library?

Please , put the answer

got any ideas?

I'll do #1.
124+139 = 263 books in all

Hi Nawaf, I think I got this:

2) there are 387 Dvds and 154 Dvds are on loan. So that means 387 minus 154 will be the amount still left. so lets do it.
387
-154
-----
233
But we have to put it to the nearest hundred. So
233--->200

200 are left, to the nearest hundred

3) For number 3, there is not enough information, therefore it is not possible to get the answer. Nawaf, did you happen to forget the write the amount of books he has due? Because if you just say that one overdue library book is 75sc and s1.10 for another, I need to have more information.

Hope this helps!

Doug owes75c for overdue library book and $1.10 for another.How much does he owe the library?

To solve these questions, let's analyze each of them and determine whether an estimate or an exact answer is required.

1. People donated 124 books last month and 139 books this month. To find the total number of books donated in this period, we can simply add the two amounts together, as there is no need for estimation.

Exact Answer: 124 + 139 = 263 books were donated in this period.

2. The library has 387 DVDs, and 154 DVDs are currently on loan. To find how many DVDs are left in the library, we need to subtract the number of loaned DVDs from the total amount. However, the question asks for the answer to the nearest hundred, indicating that an estimate is acceptable. We can round the result to the nearest hundred to provide an estimate.

Estimated Answer: 387 - 154 = 233 DVDs left in the library (rounded to the nearest hundred).

3. Doug owes $0.75 for one overdue book and $1.10 for another. To find the total amount he owes, we need to add the two amounts together. Since the amounts are given in cents, we need to convert them to dollars by dividing each amount by 100 before performing the addition.

Exact Answer: $0.75 + $1.10 = $1.85 is the total amount that Doug owes the library.

In this case, an exact answer is required since the values are given with precision in dollars and cents.