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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 342 · 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. 1.32 + 87 =
  2. 2.24 + 32 =
  3. 3.47 + 18 =
  4. 4.63 + 55 =
  5. 5.69 + 15 =
  6. 6.71 + 71 =
  7. 7.38 + 88 =
  8. 8.89 + 84 =
  9. 9.37 + 81 =
  10. 10.74 + 71 =
  11. 11.57 + 58 =
  12. 12.78 + 48 =
  13. 13.39 + 44 =
  14. 14.51 + 62 =
  15. 15.39 + 53 =
  16. 16.83 + 15 =
  17. 17.75 + 47 =
  18. 18.62 + 44 =
  19. 19.40 + 55 =
  20. 20.74 + 41 =
  21. 21.86 + 69 =
  22. 22.53 + 12 =
  23. 23.61 + 15 =
  24. 24.23 + 84 =
  25. 25.51 + 63 =
  26. 26.30 + 13 =
  27. 27.45 + 89 =
  28. 28.28 + 31 =
  29. 29.82 + 26 =
  30. 30.77 + 56 =
  31. 31.47 + 62 =
  32. 32.22 + 56 =
  33. 33.57 + 82 =
  34. 34.53 + 65 =
  35. 35.33 + 52 =
  36. 36.83 + 33 =
  37. 37.37 + 88 =
  38. 38.25 + 47 =
  39. 39.62 + 84 =
  40. 40.49 + 76 =

Answer key

  1. 119
  2. 56
  3. 65
  4. 118
  5. 84
  6. 142
  7. 126
  8. 173
  9. 118
  10. 145
  11. 115
  12. 126
  13. 83
  14. 113
  15. 92
  16. 98
  17. 122
  18. 106
  19. 95
  20. 115
  21. 155
  22. 65
  23. 76
  24. 107
  25. 114
  26. 43
  27. 134
  28. 59
  29. 108
  30. 133
  31. 109
  32. 78
  33. 139
  34. 118
  35. 85
  36. 116
  37. 125
  38. 72
  39. 146
  40. 125

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