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Add and subtract to 100: 2nd grade math

Add/subtract within 100 fluently using place-value strategies. A free 2nd grade lesson plan, a question set with answers and a printable sheet with its key. Copy it and make it yours.

Lesson plan

Goal

  • Students can do this: add/subtract within 100 fluently using place-value strategies.

Teach (10 min)

  • To add, add the tens, then add the ones, then put them together.
  • 34 + 25: 30 + 20 = 50, and 4 + 5 = 9. That's 59.
  • Work one example on the board while students say each step aloud, then do one together.

Practise (15 min)

  • Students work the printable sheet in pairs, then alone.
  • Or practise it as a game with no sign-up: https://peabody.kids/math/whole.add2?lesson=2-add&at=2

Exit ticket (5 min)

  • Use the first three questions on the printable sheet as a slip.

Printable sheet

Name: ____________________   Date: ____________

Add and subtract to 100 (2nd grade)

  1. 80 + 7 = ?
    80+ 7
  2. 20 + 9 = ?
    20+ 9
  3. 33 + 60 = ?
    33+ 60
  4. 80 + 10 = ?
    80+ 10
  5. 54 + 20 = ?
    54+ 20
  6. 27 + 20 = ?
    27+ 20
  7. 20 + 61 = ?
    20+ 61
  8. 33 + 22 = ?
    33+ 22
  9. 22 + 21 = ?
    22+ 21
  10. 35 + 50 = ?
    35+ 50
  11. 50 + 40 = ?
    50+ 40
  12. 39 + 50 = ?
    39+ 50
Key
  1. 87
  2. 29
  3. 93
  4. 90
  5. 74
  6. 47
  7. 81
  8. 55
  9. 43
  10. 85
  11. 90
  12. 89

Written by Peabody from its own skill pages. Free, no ads, no sign-in. Children can practise this on Peabody. More from teachers: teacher-shared resources.