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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 437 · 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. 1.46 + 63 =
  2. 2.77 + 31 =
  3. 3.47 + 84 =
  4. 4.44 + 33 =
  5. 5.27 + 89 =
  6. 6.28 + 66 =
  7. 7.44 + 21 =
  8. 8.76 + 13 =
  9. 9.86 + 53 =
  10. 10.31 + 87 =
  11. 11.52 + 49 =
  12. 12.89 + 62 =
  13. 13.60 + 68 =
  14. 14.40 + 56 =
  15. 15.42 + 51 =
  16. 16.50 + 62 =
  17. 17.38 + 55 =
  18. 18.71 + 34 =
  19. 19.42 + 29 =
  20. 20.58 + 63 =
  21. 21.38 + 58 =
  22. 22.35 + 57 =
  23. 23.21 + 45 =
  24. 24.74 + 79 =
  25. 25.79 + 25 =
  26. 26.48 + 45 =
  27. 27.34 + 84 =
  28. 28.57 + 56 =
  29. 29.39 + 63 =
  30. 30.49 + 71 =
  31. 31.73 + 81 =
  32. 32.72 + 81 =
  33. 33.41 + 14 =
  34. 34.42 + 12 =
  35. 35.66 + 89 =
  36. 36.36 + 39 =
  37. 37.39 + 31 =
  38. 38.25 + 85 =
  39. 39.66 + 15 =
  40. 40.88 + 51 =

Answer key

  1. 109
  2. 108
  3. 131
  4. 77
  5. 116
  6. 94
  7. 65
  8. 89
  9. 139
  10. 118
  11. 101
  12. 151
  13. 128
  14. 96
  15. 93
  16. 112
  17. 93
  18. 105
  19. 71
  20. 121
  21. 96
  22. 92
  23. 66
  24. 153
  25. 104
  26. 93
  27. 118
  28. 113
  29. 102
  30. 120
  31. 154
  32. 153
  33. 55
  34. 54
  35. 155
  36. 75
  37. 70
  38. 110
  39. 81
  40. 139

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