Joe sold 145 cups of lemonade. Jim sold 218 cups of lemonade. About how many cups did the sell in all? Round each number to the nearest 10 and then add.
They sold about 370 in all.
Bookshelf one has 549 books. Bookshelf two has 863 books. Bookshelf three has 398 books. About how many books are there in all? Round each number to the nearest 100 and then add.
There are about 1,800 books in all.
______ + 2,058 = 6,323
4, 265
______ - 684 = 1,877
2,561
Joe has 1,678 baseball cards and Tom has 1,425. About how many cards do they have in altogether? Round each number to the nearest hundred and then add.
They have about 3,100 cards.
4, 672 + ______ = 8,251
3,579
5,010 - ______ = 1,325
3,685