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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 60 · 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. 1.47 + 38 =
  2. 2.51 + 36 =
  3. 3.56 + 22 =
  4. 4.76 + 64 =
  5. 5.57 + 87 =
  6. 6.37 + 21 =
  7. 7.42 + 53 =
  8. 8.37 + 75 =
  9. 9.80 + 51 =
  10. 10.83 + 89 =
  11. 11.84 + 78 =
  12. 12.42 + 21 =
  13. 13.89 + 66 =
  14. 14.58 + 16 =
  15. 15.31 + 14 =
  16. 16.84 + 61 =
  17. 17.75 + 36 =
  18. 18.40 + 21 =
  19. 19.46 + 29 =
  20. 20.85 + 61 =
  21. 21.44 + 64 =
  22. 22.42 + 43 =
  23. 23.28 + 78 =
  24. 24.51 + 51 =
  25. 25.43 + 24 =
  26. 26.69 + 27 =
  27. 27.60 + 78 =
  28. 28.30 + 67 =
  29. 29.52 + 64 =
  30. 30.29 + 77 =
  31. 31.73 + 79 =
  32. 32.53 + 44 =
  33. 33.24 + 42 =
  34. 34.69 + 44 =
  35. 35.74 + 81 =
  36. 36.35 + 46 =
  37. 37.55 + 78 =
  38. 38.22 + 65 =
  39. 39.88 + 81 =
  40. 40.70 + 83 =

Answer key

  1. 85
  2. 87
  3. 78
  4. 140
  5. 144
  6. 58
  7. 95
  8. 112
  9. 131
  10. 172
  11. 162
  12. 63
  13. 155
  14. 74
  15. 45
  16. 145
  17. 111
  18. 61
  19. 75
  20. 146
  21. 108
  22. 85
  23. 106
  24. 102
  25. 67
  26. 96
  27. 138
  28. 97
  29. 116
  30. 106
  31. 152
  32. 97
  33. 66
  34. 113
  35. 155
  36. 81
  37. 133
  38. 87
  39. 169
  40. 153

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