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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 622 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.55 + 29 =
  2. 2.38 + 68 =
  3. 3.51 + 24 =
  4. 4.50 + 25 =
  5. 5.24 + 44 =
  6. 6.67 + 67 =
  7. 7.51 + 37 =
  8. 8.23 + 89 =
  9. 9.54 + 24 =
  10. 10.39 + 38 =
  11. 11.88 + 22 =
  12. 12.37 + 45 =
  13. 13.54 + 33 =
  14. 14.29 + 65 =
  15. 15.38 + 38 =
  16. 16.61 + 51 =
  17. 17.88 + 33 =
  18. 18.67 + 56 =
  19. 19.49 + 26 =
  20. 20.74 + 34 =
  21. 21.60 + 57 =
  22. 22.62 + 21 =
  23. 23.36 + 21 =
  24. 24.30 + 81 =
  25. 25.79 + 17 =
  26. 26.72 + 61 =
  27. 27.52 + 15 =
  28. 28.60 + 62 =
  29. 29.56 + 55 =
  30. 30.78 + 16 =
  31. 31.34 + 67 =
  32. 32.23 + 19 =
  33. 33.30 + 55 =
  34. 34.71 + 36 =
  35. 35.25 + 38 =
  36. 36.43 + 18 =
  37. 37.66 + 43 =
  38. 38.25 + 58 =
  39. 39.57 + 26 =
  40. 40.86 + 26 =

Answer key

  1. 84
  2. 106
  3. 75
  4. 75
  5. 68
  6. 134
  7. 88
  8. 112
  9. 78
  10. 77
  11. 110
  12. 82
  13. 87
  14. 94
  15. 76
  16. 112
  17. 121
  18. 123
  19. 75
  20. 108
  21. 117
  22. 83
  23. 57
  24. 111
  25. 96
  26. 133
  27. 67
  28. 122
  29. 111
  30. 94
  31. 101
  32. 42
  33. 85
  34. 107
  35. 63
  36. 61
  37. 109
  38. 83
  39. 83
  40. 112

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