Estimating Sums & Differences: 4th Grade Math Challenge

Lily has 245 marbles. She buys 128 more. Estimate how many marbles she has now.

• 300

• 380

• 400

• 370

A bakery made 375 cookies in the morning and 289 in the afternoon. Estimate the total number of cookies made.

• 700

• 600

• 500

• 800

Tom read 156 pages of his book. He plans to read 89 more pages. Estimate how many pages he will read in total.

• 200

• 300

• 156

• 245

A toy store had 482 toys. They sold 215 toys. Estimate how many toys are left in the store.

• 300

• 250

• 200

• 267

Sarah has 320 stickers. She gives 145 stickers to her friends. Estimate how many stickers she has left.

• 150

• 100

• 175

• 200

In a park, there are 540 trees. If 215 trees are planted, estimate how many trees are in the park now.

• 1000

• 755

• 540

• 215

A farmer harvested 678 apples. He sold 289 apples at the market. Estimate how many apples he has left.

• 389

• 300

• 350

• 400

A library has 1,250 books. If 367 books are checked out, estimate how many books remain in the library.

• 883

• 900

• 750

• 1,000

During a sale, a store had 450 shirts. They sold 198 shirts. Estimate how many shirts are still available.

• 150 shirts

• 252 shirts

• 200 shirts

• 300 shirts

A class collected 312 cans for a food drive. They donated 145 cans. Estimate how many cans they have left.

• 167 cans

• 180 cans

• 200 cans

• 150 cans