Estimating and Checking Subtraction: 3-Digit Challenges

A bakery made 425 cookies. They sold 178 cookies. How many cookies are left? Estimate the difference first.

• 247

• 200

• 300

• 150

A library had 312 books. They donated 145 books to a local school. How many books does the library have now? Check your subtraction accuracy.

• 200

• 180

• 150

• 167

There are 654 marbles in a jar. If 289 marbles are taken out, how many marbles remain? Estimate the difference before calculating.

• 250

• 365

• 300

• 400

A toy store had 487 toys. They sold 236 toys during a sale. How many toys are still in the store? Verify your answer by checking the subtraction.

• 251

• 245

• 260

• 300

A farmer harvested 732 apples. He gave away 215 apples to friends. How many apples does he have left? Estimate the difference to check your work.

• 450

• 517

• 500

• 600

A school had 540 pencils. After giving 198 pencils to students, how many pencils are left? Check your answer by adding the pencils given away to the remaining pencils.

• 400

• 342

• 250

• 198

A zoo had 820 visitors in one day. If 365 visitors left by the end of the day, how many visitors stayed? Estimate the difference to help with your calculation.

• 500

• 455

• 365

• 720

A factory produced 950 toys. If 478 toys were shipped to stores, how many toys are left in the factory? Check your subtraction accuracy after solving.

• 472

• 422

• 950

• 478

A concert had 1,200 tickets available. If 675 tickets were sold, how many tickets are still available? Estimate the difference to confirm your answer.

• 600

• 525

• 400

• 300

A gardener planted 600 flowers. If 245 flowers died, how many flowers are still alive? Check your answer by adding the flowers that died to the remaining flowers.

• 250

• 400

• 355

• 345