Question

There are 100 books on the shelves. on the table there are 15 stacks of books with 10 books in each stack. What 3 digit number tells how many books there are

Answer 1

100 + 15 * 10 = 100 + 150 = 250
250 books I guess.

Answer 2

250

Explanation:

We have 100 boos in on the shelves.

Also we have on the table 15 stacks of books with 10 books each:

We can express this as 15*10 = 150 books in total on the table.

Now we have to add the total of books we have:

100 (books on the shelves) + 150 (books on the table) = 250 books in total.