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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 334 · 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. 1.40 + 31 =
  2. 2.76 + 36 =
  3. 3.33 + 21 =
  4. 4.84 + 71 =
  5. 5.31 + 34 =
  6. 6.54 + 54 =
  7. 7.26 + 61 =
  8. 8.56 + 19 =
  9. 9.28 + 51 =
  10. 10.38 + 87 =
  11. 11.69 + 37 =
  12. 12.67 + 51 =
  13. 13.85 + 67 =
  14. 14.36 + 12 =
  15. 15.81 + 19 =
  16. 16.26 + 35 =
  17. 17.34 + 33 =
  18. 18.23 + 89 =
  19. 19.58 + 13 =
  20. 20.23 + 44 =
  21. 21.65 + 79 =
  22. 22.30 + 21 =
  23. 23.40 + 21 =
  24. 24.71 + 41 =
  25. 25.68 + 38 =
  26. 26.51 + 83 =
  27. 27.75 + 55 =
  28. 28.49 + 84 =
  29. 29.69 + 48 =
  30. 30.27 + 66 =
  31. 31.35 + 75 =
  32. 32.43 + 62 =
  33. 33.32 + 28 =
  34. 34.52 + 73 =
  35. 35.80 + 15 =
  36. 36.69 + 72 =
  37. 37.57 + 64 =
  38. 38.57 + 56 =
  39. 39.75 + 14 =
  40. 40.72 + 57 =

Answer key

  1. 71
  2. 112
  3. 54
  4. 155
  5. 65
  6. 108
  7. 87
  8. 75
  9. 79
  10. 125
  11. 106
  12. 118
  13. 152
  14. 48
  15. 100
  16. 61
  17. 67
  18. 112
  19. 71
  20. 67
  21. 144
  22. 51
  23. 61
  24. 112
  25. 106
  26. 134
  27. 130
  28. 133
  29. 117
  30. 93
  31. 110
  32. 105
  33. 60
  34. 125
  35. 95
  36. 141
  37. 121
  38. 113
  39. 89
  40. 129

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