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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 104 · 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. 1.59 + 89 =
  2. 2.66 + 36 =
  3. 3.59 + 81 =
  4. 4.41 + 41 =
  5. 5.26 + 25 =
  6. 6.71 + 62 =
  7. 7.76 + 19 =
  8. 8.26 + 81 =
  9. 9.77 + 71 =
  10. 10.39 + 63 =
  11. 11.73 + 25 =
  12. 12.54 + 64 =
  13. 13.32 + 82 =
  14. 14.81 + 37 =
  15. 15.46 + 53 =
  16. 16.85 + 27 =
  17. 17.78 + 78 =
  18. 18.23 + 67 =
  19. 19.72 + 38 =
  20. 20.46 + 31 =
  21. 21.77 + 43 =
  22. 22.69 + 24 =
  23. 23.64 + 65 =
  24. 24.78 + 47 =
  25. 25.30 + 13 =
  26. 26.40 + 39 =
  27. 27.28 + 47 =
  28. 28.41 + 85 =
  29. 29.89 + 74 =
  30. 30.86 + 53 =
  31. 31.75 + 87 =
  32. 32.74 + 51 =
  33. 33.54 + 35 =
  34. 34.28 + 83 =
  35. 35.31 + 73 =
  36. 36.71 + 42 =
  37. 37.45 + 26 =
  38. 38.60 + 19 =
  39. 39.21 + 44 =
  40. 40.74 + 14 =

Answer key

  1. 148
  2. 102
  3. 140
  4. 82
  5. 51
  6. 133
  7. 95
  8. 107
  9. 148
  10. 102
  11. 98
  12. 118
  13. 114
  14. 118
  15. 99
  16. 112
  17. 156
  18. 90
  19. 110
  20. 77
  21. 120
  22. 93
  23. 129
  24. 125
  25. 43
  26. 79
  27. 75
  28. 126
  29. 163
  30. 139
  31. 162
  32. 125
  33. 89
  34. 111
  35. 104
  36. 113
  37. 71
  38. 79
  39. 65
  40. 88

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