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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 129 · 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. 1.66 + 85 =
  2. 2.75 + 61 =
  3. 3.89 + 37 =
  4. 4.43 + 31 =
  5. 5.51 + 17 =
  6. 6.38 + 71 =
  7. 7.61 + 23 =
  8. 8.86 + 56 =
  9. 9.28 + 59 =
  10. 10.61 + 86 =
  11. 11.33 + 86 =
  12. 12.82 + 32 =
  13. 13.42 + 21 =
  14. 14.36 + 26 =
  15. 15.26 + 26 =
  16. 16.70 + 12 =
  17. 17.65 + 19 =
  18. 18.50 + 79 =
  19. 19.52 + 12 =
  20. 20.37 + 44 =
  21. 21.44 + 21 =
  22. 22.72 + 89 =
  23. 23.68 + 72 =
  24. 24.40 + 19 =
  25. 25.41 + 76 =
  26. 26.37 + 86 =
  27. 27.62 + 33 =
  28. 28.41 + 65 =
  29. 29.36 + 72 =
  30. 30.30 + 75 =
  31. 31.73 + 24 =
  32. 32.58 + 35 =
  33. 33.69 + 79 =
  34. 34.73 + 59 =
  35. 35.51 + 56 =
  36. 36.57 + 41 =
  37. 37.66 + 33 =
  38. 38.23 + 31 =
  39. 39.82 + 17 =
  40. 40.38 + 61 =

Answer key

  1. 151
  2. 136
  3. 126
  4. 74
  5. 68
  6. 109
  7. 84
  8. 142
  9. 87
  10. 147
  11. 119
  12. 114
  13. 63
  14. 62
  15. 52
  16. 82
  17. 84
  18. 129
  19. 64
  20. 81
  21. 65
  22. 161
  23. 140
  24. 59
  25. 117
  26. 123
  27. 95
  28. 106
  29. 108
  30. 105
  31. 97
  32. 93
  33. 148
  34. 132
  35. 107
  36. 98
  37. 99
  38. 54
  39. 99
  40. 99

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