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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 772 · 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. 1.57 + 14 =
  2. 2.87 + 66 =
  3. 3.82 + 74 =
  4. 4.33 + 14 =
  5. 5.44 + 14 =
  6. 6.78 + 32 =
  7. 7.25 + 62 =
  8. 8.44 + 25 =
  9. 9.65 + 51 =
  10. 10.28 + 83 =
  11. 11.33 + 52 =
  12. 12.27 + 34 =
  13. 13.68 + 88 =
  14. 14.69 + 13 =
  15. 15.28 + 49 =
  16. 16.73 + 35 =
  17. 17.76 + 29 =
  18. 18.43 + 31 =
  19. 19.40 + 12 =
  20. 20.39 + 34 =
  21. 21.65 + 84 =
  22. 22.29 + 13 =
  23. 23.27 + 75 =
  24. 24.48 + 39 =
  25. 25.56 + 56 =
  26. 26.36 + 32 =
  27. 27.70 + 29 =
  28. 28.59 + 24 =
  29. 29.64 + 82 =
  30. 30.80 + 79 =
  31. 31.69 + 84 =
  32. 32.22 + 12 =
  33. 33.41 + 36 =
  34. 34.52 + 55 =
  35. 35.26 + 12 =
  36. 36.31 + 52 =
  37. 37.48 + 21 =
  38. 38.34 + 51 =
  39. 39.69 + 61 =
  40. 40.21 + 86 =

Answer key

  1. 71
  2. 153
  3. 156
  4. 47
  5. 58
  6. 110
  7. 87
  8. 69
  9. 116
  10. 111
  11. 85
  12. 61
  13. 156
  14. 82
  15. 77
  16. 108
  17. 105
  18. 74
  19. 52
  20. 73
  21. 149
  22. 42
  23. 102
  24. 87
  25. 112
  26. 68
  27. 99
  28. 83
  29. 146
  30. 159
  31. 153
  32. 34
  33. 77
  34. 107
  35. 38
  36. 83
  37. 69
  38. 85
  39. 130
  40. 107

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