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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 202 · 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. 1.89 + 57 =
  2. 2.41 + 22 =
  3. 3.84 + 61 =
  4. 4.51 + 71 =
  5. 5.67 + 45 =
  6. 6.39 + 62 =
  7. 7.37 + 24 =
  8. 8.76 + 61 =
  9. 9.50 + 29 =
  10. 10.72 + 29 =
  11. 11.23 + 54 =
  12. 12.39 + 36 =
  13. 13.70 + 73 =
  14. 14.40 + 61 =
  15. 15.34 + 76 =
  16. 16.84 + 51 =
  17. 17.44 + 21 =
  18. 18.82 + 57 =
  19. 19.84 + 85 =
  20. 20.83 + 49 =
  21. 21.72 + 22 =
  22. 22.30 + 67 =
  23. 23.24 + 73 =
  24. 24.51 + 24 =
  25. 25.78 + 76 =
  26. 26.74 + 59 =
  27. 27.60 + 79 =
  28. 28.45 + 62 =
  29. 29.78 + 65 =
  30. 30.38 + 33 =
  31. 31.85 + 25 =
  32. 32.40 + 71 =
  33. 33.24 + 64 =
  34. 34.22 + 88 =
  35. 35.71 + 73 =
  36. 36.70 + 78 =
  37. 37.85 + 86 =
  38. 38.33 + 85 =
  39. 39.23 + 49 =
  40. 40.64 + 65 =

Answer key

  1. 146
  2. 63
  3. 145
  4. 122
  5. 112
  6. 101
  7. 61
  8. 137
  9. 79
  10. 101
  11. 77
  12. 75
  13. 143
  14. 101
  15. 110
  16. 135
  17. 65
  18. 139
  19. 169
  20. 132
  21. 94
  22. 97
  23. 97
  24. 75
  25. 154
  26. 133
  27. 139
  28. 107
  29. 143
  30. 71
  31. 110
  32. 111
  33. 88
  34. 110
  35. 144
  36. 148
  37. 171
  38. 118
  39. 72
  40. 129

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