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Class 3 Maths — Adding 3-digit numbers

Add two numbers up to 999, carrying a ten or a hundred where you need to.

Name: ________________________

  1. 1.348 + 256 = ?

    • a) 594
    • b) 704
    • c) 604
    • d) 614

  2. 2.Match each sum to its answer.

    • 120 + 130
    • 210 + 145
    • 308 + 60
    • 425 + 25
    • 250
    • 368
    • 355
    • 450

  3. 3.234 + 145 = ?

  4. 4.Tap where 320 + 40 lands.

    Mark the line with an X.

    300320340360380400

  5. 5.406 + 90 = ?

  6. 6.A shop has 128 red pens and 145 blue pens. How many pens altogether?

  7. 7.245 + 137 = ?

    • a) 382
    • b) 472
    • c) 372
    • d) 392

  8. 8.Put these sums in order, smallest answer first.

    • 400 + 90
    • 300 + 25
    • 101 + 102
    • 150 + 60

Answer key — Class 3 Maths — Adding 3-digit numbers

  1. 1. c) 604
  2. 2. 120 + 130 → 250; 210 + 145 → 355; 308 + 60 → 368; 425 + 25 → 450
  3. 3. 379
  4. 4. 360
  5. 5. 496
  6. 6. 273
  7. 7. a) 382
  8. 8. 1. 101 + 102 2. 150 + 60 3. 300 + 25 4. 400 + 90