Addition Within 1000 Worksheets Grade 3

Mathematics

Addition with three-digit numbers

Each printable worksheet below is a full page of practice problems and comes with an answer key that explains how to solve every problem, step by step. Open a worksheet and use the Print / Save as PDF button to download it.

Worksheet 1

7 problems
  1. A rectangular garden has 8 rows of flowers. Each row has 7 flowers. How many flowers are there in the garden?
  2. Emma is collecting shells at the beach. On Monday, she found 127 shells. On Tuesday, she found 85 more shells. Then she gave 43 shells to her friend Liam. How many shells does Emma have now?
  3. Liam's school is collecting cans for recycling. On Monday, they collected 345 cans. On Tuesday, they collected 278 cans. How many cans did they collect in total over the two days?

…and 4 more problems

Open & Print Worksheet 1

Worksheet 2

6 problems
  1. Lily's school is collecting cans for a food drive. On Monday, students brought in 347 cans. On Tuesday, they collected 285 more cans. How many cans did the school collect in total over the two days?
  2. A rectangular garden has a length of 85 meters and a width of 47 meters. What is the total distance around the garden?
  3. Liam is collecting baseball cards. He has 285 cards in his main collection and his grandmother gives him 125 more cards for his birthday. How many baseball cards does Liam have now?

…and 3 more problems

Open & Print Worksheet 2

Worksheet 3

9 problems
  1. 456 + 378 = ?
  2. 756 + 489 = ?
  3. 567 + 289 = ?

…and 6 more problems

Open & Print Worksheet 3

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