Estimating
Round to the nearest 100 and find the sum. 719+194=n
900
341+387=n
728
146-129=n
17
On Friday, 368 books were checked out of the library. On Saturday, 282 books were checked out of the library. What is the number of books checked out of the library during the two days in all?
650 books
At the pet store this morning, there were 26 fish in an aquarium and 32 fish in the other aquarium. At noon, 11 fish sold. How many fish are left in the aquariums?
47 Fish
Round to the nearest 10 and find the difference. 567-259-n
310
823+177=n
1,000
893-635=n
258
A group of 113 third graders and 129 fourth graders went to the zoo. What is the total number of students who went to the zoo?
242 students
There were 194 people on the train. At the first stop, 75 more people got on the train. At the second stop, 28 people got off the train. How many people are on the train now?
241 People
Mike grew 586 cantaloupes. Sandy grew 372 cantaloupes. Estimate how many cantaloupes they grew in total to the nearest 10?
960 Cantaloupes
809+128=n
937
355-125=n
230
Casey has 883 stickers in a box. She gave 388 stickers away. How many stickers does Casey have left?
495 stickers
The third grade classes collected a total of 782 cans for the food drive. Class A collected 359 cans and Class B collected 126 cans. How many can did Class C collect?
297 Cans
There are 219 pencils in the drawer. Joan placed 294 more pencils in the drawer. Estimate how many pencils are now in the drawer to the nearest 10.
510 Pencils
413+379=n
792
914-564=n
350
The cafeteria cooked 246 hot dogs. 127 hot dogs were eaten. How many hot dogs are left?
119 hot dogs
There are 137 cars in the movie theater parking lot. 112 more cars parked in the lot before the movie started, but then 46 cars left. How many cars are in the parking lot now?
203 Cars
Sam picked 689 apples and Tim picked 947 apples from the apple tree. Estimate how many more apples Tim picked than Sam to the nearest 10.
260 Apples
293+962=n
1255
328-159=n
169
Kristen has a book that has 336 pages. She read 217 pages. How many pages does she have left to read?
119 pages
There were 289 people at the start of the football game. 134 more people came to watch the game at half time. Now there are 513 people at the game. How many more people are at the game now than at half time?
90 People