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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 235 · 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. 1.49 + 38 =
  2. 2.49 + 12 =
  3. 3.30 + 61 =
  4. 4.50 + 45 =
  5. 5.64 + 19 =
  6. 6.66 + 26 =
  7. 7.80 + 24 =
  8. 8.29 + 88 =
  9. 9.32 + 34 =
  10. 10.57 + 51 =
  11. 11.60 + 81 =
  12. 12.74 + 84 =
  13. 13.30 + 53 =
  14. 14.61 + 73 =
  15. 15.74 + 17 =
  16. 16.59 + 48 =
  17. 17.76 + 83 =
  18. 18.47 + 56 =
  19. 19.39 + 23 =
  20. 20.57 + 81 =
  21. 21.29 + 61 =
  22. 22.59 + 62 =
  23. 23.38 + 72 =
  24. 24.56 + 17 =
  25. 25.86 + 65 =
  26. 26.54 + 66 =
  27. 27.36 + 19 =
  28. 28.71 + 67 =
  29. 29.60 + 31 =
  30. 30.46 + 42 =
  31. 31.45 + 21 =
  32. 32.45 + 86 =
  33. 33.88 + 23 =
  34. 34.51 + 21 =
  35. 35.58 + 34 =
  36. 36.61 + 68 =
  37. 37.85 + 76 =
  38. 38.34 + 59 =
  39. 39.35 + 33 =
  40. 40.54 + 61 =

Answer key

  1. 87
  2. 61
  3. 91
  4. 95
  5. 83
  6. 92
  7. 104
  8. 117
  9. 66
  10. 108
  11. 141
  12. 158
  13. 83
  14. 134
  15. 91
  16. 107
  17. 159
  18. 103
  19. 62
  20. 138
  21. 90
  22. 121
  23. 110
  24. 73
  25. 151
  26. 120
  27. 55
  28. 138
  29. 91
  30. 88
  31. 66
  32. 131
  33. 111
  34. 72
  35. 92
  36. 129
  37. 161
  38. 93
  39. 68
  40. 115

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