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Adding multi-digit numbers

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Intros
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Lessons
  1. Introduction to Adding Multi-Digit Numbers

    Overview of lesson
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Examples
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Lessons
  1. Adding 2-Digit Numbers with Regrouping
    1. 13 + 9
    2. 36 + 28
    3. 45 + 86
    4. 58 + 42
  2. Adding 3-Digit Numbers with Regrouping
    1. 136 + 557
    2. 758 + 163
    3. 128 + 879
  3. Adding 4-, 5- and 6- Digit Numbers with Regrouping
    1. 2863 + 3478
    2. 6481 + 7319
    3. 41285 + 18468
    4. 283591+ 321428
  4. Adding three numbers
    1. 22 + 450 + 312 
    2. 638 + 385 + 128
  5. Multi-Digit Adding with Regrouping: Word Problems
    1. Ben collects stamps and keeps them in three boxes (red, green and blue boxes). The red box has 780 stamps. The green box has 445 stamps and the blue box has 173 stamps. How many stamps does he have in total?
    2. Usually there are 2353 chairs in the auditorium. Before a show, 1868 more chairs are added. How many chairs are there for the show?